Promaxx sbc heads review. com ProMaxx BBC Head Review.

Promaxx sbc heads review '69 Malibu. ALL PERFORMANCE SERIES HEADS SOLD IN PAIRS! DX Series 6. Shop Now at the Guaranteed Lowest Price! $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: LASTCHANCE Took me a yr to come up with the money to by bare promaxx 185. 00 Select Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC I used a set of the 183’s on my SBC 327 build and they’re ok. Dyno results show 20 to 35 hp gains over the competition.   Asked by: trans am bob. Messages 70 Reaction score 55 Location Banghart Diesel & Performance put down 355hp/659tq through a set of ProMaxx heads recently and a bunch of 185cc Aluminum Small Block Chevy Cylinder Heads. 600 Hyd Roller: 3183SR: 183 Maxx SBC Assy Solid Roller: Straight: 64: 2. Series One 175 SBF (Sold in Pairs) Maxx 200 SBC (Sold in Pairs) $ 950. Get the Best Performance with ProMaxx Performance Project X Assembled Aluminum Cylinder Heads for Small Block Chevy (200cc) 9197A parts at JEGS. I got to looking at the advertised flow numbers for the AFR's. i m pretty new on the head porting game . Engine runs great and not looking for new heads, but I was looking at the AFR 195 Enforcer heads. ; Will these heads work on a 400 sbc , I can’t seem to find any heads that have the steam hole provisions for a 400 Asked by: John. Cheaper heads need guide work and sometimes a valve job before you can use them. The economical "As-Cast" aluminum versions feature ultra-smooth 356-T6 casting, precision Head also features dual intake and valve cover bolt patterns. Couple that Ultra-smooth 356-T6 Aluminum Casting; Competition 5 angle valve job; Hand Bowl Blending; Precision designed Runners; Large Spring pockets; 200cc intake runner The foundry is a modern, high tech foundry that casts all sorts of different parts. braveshop. I had never seen them before. 185 SBC Series 1 Assy Hyd Roller: Angle: 64: 2. Heck the NKB says like on the Ebay site to only go 65 pounds on their heads and called and got same answer. I review and flow a SBC ProMaxx 200cc head. The MAXX Series is taking the affordable performance cylinder head to the next level. 2" 3. The heads he's talking about are made by promaxx, and from all the reviews and articles i've seen, they make some nice heads. 500-250, . Well here is Eric's video comparison between BBc ProMaxx 317 with 2. 6: 2178: 190 Maxx SBC Bare: Angle: 72: 2. Find PROMAXX Performance Maxx Series Small Block Chevy Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. 1 6 of 427 sbc, TH400, 3. 1 2 of 6 I think it's safe to say there isn't a lot of material "missing" in the ProMaxx head. 575 lift. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque This head is a brand new piece from a brand new source. Write a Review View All Reviews. Specifications: Part Type. 880" If we have time, 4. 250 intake. but there are vastly fewer “larger” std platform cylinder head choices than for a SBC. 1 4 of 6 These could become a 400cfm head with very little work and probably end up in the 320-322 cc rage, 383 SBC. We compared it to AFR/Brodix/Canfield that we have in the shop. 050 cam, mine had . Assembled heads feature 21-4N Stainless Swirl back cut valves, studs and guide plates VALVE SIZE: MAX LIFT: 9183: 183 Maxx SBC Assy: Straight: 64: 2. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, I show dyno results from three different heads on the same engine. ports heads for sure, but I just feel the ovals are more suited for my street application at this point. TCI TH350. 600-251 The Maxx 200 is the ultimate “as cast” head available that produces CNC type flow number, flowing over 280cfm. Shop Cylinder Heads at Summit Racing. com/#!/2024-SBC-Dyno-Mule Free Shipping - PROMAXX Performance Freedom Series Small Block Chevy Cylinder Heads with qualifying orders of $109. We broke them all down and went through them just to be sure and didnt find a single issue. Flow numbers seem to be almost exactly the same as Profiler on intake, higher on exhaust. $5 Off Your $100 Mobile App Purchase - Get the App Reviews; Q & A; 215cc Intake Runner. Instructions & Calculators Compression Calculator. these heads are actually patriot clyinde heads. This head has produced over 550 hp on pump gas and mild cam . ProMaxx's full CNC port head is quite good as well. AFR165's right out of the box bolted to a refreshed stock block, stock cam 5. 600 Hyd Roller: 9200 SR: 200 Maxx SBC I have a set of these Pro Maxx # 9175 I wanted to try out on my blueprint remanufactured 5. rocker arm studs, and guide plates; Valve springs for use with a hydraulic flat-tappet camshaft with a maximum valve lift of . wengines. 00 as well as being available bare. com ProMaxx BBC Head Review Jump to Latest 61 - 80 of 111 Posts. Better money spent to go aftermarket? On another forum cstraub did good review on them said they wasn't junk but not quite AFR level. 700 Solid Roller: This video reviews the Promaxx Performance Freedom Series aluminium cylinder head that you can buy from outlets such as Summit Racing. Find PROMAXX Performance Project X Small Block Chevrolet Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! PROMAXX Performance Project X small block Chevrolet cylinder heads have the right stuff to perfectly fit your budget build with abundant power. 00 Select options This product has multiple variants. 600 Hyd Roller: 2168SR: 185 SBC Series 1 Assy Solid Roller: Angle: 64: 2. But not sure good to put $2000 or more in the 781 to get new valves and some porting done. Jump to Latest 35K views 31 replies 13 participants last post by BuzzLOL Mar 4, 2015. We'll be pushing them Has anyone here ran the 225 shocker series head from Promaxx ? They look good on paper. Though ProMaxx offered both smaller, as-cast and larger CNC-ported heads featuring 370cc intake runners, we opted for the middle of the three available heads. 6 These things look like $1600 heads guys, I'm not kidding. 30/1. 60 valve size; Screw in studs; Large spring pockets; Product Reviews. Rated 5 out of 5 by blutto from good heads checked them over really good and think they will run great combustion chambers came in at 62 cc and i had a hard time finding headers to fit my app and i thought they would take center bolt covers other than that perfect Not seeing how assault heads would be better. I ported several of those. 00 – $ 1,525. ProMaxx Performance Cylinder Heads available: Big Block Chevrolet (BBC) Cylinder Heads available in 320cc & 360cc at different valve sizes. Reviews; Q & A; 185cc Aluminum Small What do performance cylinder heads do? ProMaxx 2169 performance cylinder heads optimize airflow, combustion, and power output, enhancing your engine's overall performance. 24sec/118mph. Weight: 109 lbs: Related products. Estimated Ship Date: Oct 28, 2024. Answered by: jshook. PROMAXX Performance Vortec 185cc Iron Cylinder Heads 2151 PMX-2151. Anybody ran any on a solid roller 383 sbc drag only engine. I bought a set of their 200cc sbc heads recently for my fiancés Chevelle. Then save $8/month for 4 mos. Not Yet Reviewed. Are the push rod holes Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. Save Share The ProMaxx head casting is a nice casting. A budget head on a 434 is going to peak way early and disappoint you, even with the proper solid roller cam. ProMAXX Performance has designed a complete new line of performance heads that meet or exceed the big names in the industry. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque The SBF Maxx 180 is an as cast head that beats the competition. https://promaxxperformance. Even the ''as cast'' heads utilize ultra-smooth new runner and chamber designs that produce ''CNC'd type'' flow numbers. The 200cc looks pretty good too. comEmail: weingartnerracing@gmail. They showed up assembled with their parts. The engine is proving, with proper tuning, to be a real stormer for a little hyd roller cam 355. SHARE POST #8. The Maxx 225cc SBC head is our largest “as cast” head in our line up, flowing close to 300 cfm @ . 185cc SBC Vortec 2. With the right heads, the peak torque occurred where the stock heads made peak power. 6: 2180: 190 Maxx SBC Assy Get the Best Performance with ProMaxx Performance 183 Series Aluminum Cylinder Heads Small Block Chevy Straight Plug 9183 parts at JEGS. 200-133, . Date published: 2023-08-11 I have done many many 6. 1 383 sbc? Been hearing good things a out promaxx but don't want to bite the bullet just yet . Part Number: PMX-2151 Estimated Ship Date: Jan 13, 2025 Dart and others offer race-style heads with shallower valve angles that unshroud the valves and aid in power production. The economical "As-Cast" aluminum versions feature The Shocker 225 CNC is the ultimate 23 degree small block Chevy head. With Freedom Series small block Chevy cylinder heads, PROMAXX Performance offers you the opportunity to bolt on the 4. Machined and assembled in the USA. 02/1. 0 out of 5 by 2. PROMAXX Performance Products specializes in all types of automotive cylinder head for any budget, carrying Performance cylinder heads, diesel cylinder heads and stock replacement cylinder heads. T. Making great power at a price that cannot be matched. The Maxx 200 is the ultimate “as cast” head available that produces CNC type flow number, flowing over 280cfm. 08/1. 700″ lift. Promaxx bought Patriot, and sells them I just stumbled across the ProMaxx "Project X" SBC heads on Summit's site. Flat Tappet: Item Number: PMX9183 Be the first to review this item: Unit Price: $1,164. The internet says that PROMAXX OR ASSAULT OR FLO-TEK 200CC BARE HEADS are new and improved now and I'm thinking about one of them or PROFILER USA BARE HEADS . x heads over the years so this is my honest review of the "ProMax" heads Last edited: Jan 25, 2020. The quality is what I care about and am willing to put my name behind. Really don't think I need that level head either. 600 Hyd Roller: 9218S: Project X 215 SBC Solid Roller: Straight: 64: 2. 88 stainless (back-cut and swirl polished) valve combo, 122cc combustion chambers, and intake flow that exceeded 400 cfm (peaking at I do a review of the AFR Enforcer SBC head. Part Number: PMX-92002HR. I guess since everybody is LS crazy right now, a new SBC head isn't major news but it was a great discovery. Dart’s latest 9-degree SBC race casting is sold un-finished for head porters and engine builders to port to their needs. Honestly the casting looks better than the set of AFRs I bought for my BBC. 383 SBC. Promaxx, and the NKOTB heads They were in the running when I was head hunting for my SBC. There's videos on youtube where a guy had the alumnun tested, and it was top quality stuff. 60 valves 64cc Combustion Chamber Hydraulic Flat Tappet Spring up to . 080 clearance on the intake, over . Went to the ProMaxx site and checked them out, and they seem to be comparable to the Profiler All-American 210 heads. Part Number: PMX-2102. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use bvseo-REVIEWS; bvseo-PRODUCT; bvseo-getContent; What size pipe plugs go on the cylinder head. It requires no special components. Save Share Reply Quote Ultra-smooth 356-T6 Aluminum Casting; Competition 5 angle valve job; Hand Bowl Blending; Precision designed Runners; Large Spring pockets; 185cc intake runner ProMaxx, Maxx Series Chev SB Aluminum Heads, 183cc/64cc, Straight Plug, Assembled, Hyd. I know AFR IS THE BEST ,but I have 5 grandkids to spoil also so if I can save $1000. So far I really like the casting and quality of finish. There is NO AS CAST head on the market that can outflow these heads PERIOD! We have done our homework and produced what we believe is the best as cast head-on at an affordable price. They aren't like that procomp garbage. But that doesn’t tell the whole story. This head will support big power at a price that can’t be beat. 00 other than AFR new chinese My ProMaxx Maxx 200cc sbc heads arrived. 700 Solid Roller: 9183SRT Promaxx maxx series or profiler all American for 11. Edelbrock e heads are good to but are priced close the the afr's. Maxx 190 SBC (Sold in Pairs) $ 937. These heads are very ch PROMAXX Performance Project X small block Ford cylinder heads are one word—awesome! They feature ultra-smooth 356-T6 aluminum casting, 5-angle valve jobs, precision CNC machining, and diamond-honed bronze guides and can make big power in your small block Ford application. 00 – $ 1,512. SLPRACINGENGINES wrote:i saw a vidoe on youtube of the promaxx heads. 300-188, . 310, 4. The ProMaxx 723-2171 cylinder head uses 3/8 npt plugs. I I review the SBC Promaxx 225cc cnc ported heads and give you flow numbers from both of my flowbenches. PROMAXX Performance Project X small block Ford cylinder heads are one word—awesome! They feature ultra-smooth 356-T6 aluminum casting, 5-angle valve jobs, Find PROMAXX Performance Project X Small Block Chevrolet Cylinder Heads 215cc Intake Runner Volume (cc) and get Free Shipping on Orders Over $109 at Summit Racing! PROMAXX Performance Project X small block Chevrolet cylinder heads have the right stuff to perfectly fit your budget build with abundant power. 6: 2179: 190 Maxx SBC Bare: Straight: 72: 2. 55 12-bolt n/a best: 11. This is what I am planning. check out this video comparing the full cnc promaxx 340 bbc heads against the as-cast afr 345 h full dyno results-340 promaxx vs 345 afr-cheap vs brand name? Find PROMAXX Performance Cylinder Heads 72 Combustion Chamber Volume (cc) My Reviews; My Questions; Catalogs; Tax Exemption; Sign In SBC 220cc As Cast 2. For high-flowing cylinder heads at a great price, get PROMAXX Performance Project X small block Chevrolet cylinder heads. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small PROMAXX Performance Project X Small Block Chevrolet Cylinder Heads 9217S PMX-9217S. The options may be chosen on the product page Series One 185 SBC (Sold in Pairs) I have a set of ported factory ls3 heads already but I was thinking that if I bought bare liberty or promaxx heads and had them gone threw with good valves and springs I could be in them less then 2k and have an 11 degree head with a thicker deck then stock with all good parts and I’m looking for a smaller chamber then stock to get my compression where I want it Wondering if anyone used any promaxx 317 yet. Porting is equivalent to other companies more The Maxx 190 is the ultimate “as cast” head available that produces CNC type flow number, flowing over 260cfm. The new swirl designed chamber is the difference. Estimated Ship Date: Nov 11, 2024 if ordered today. Website: www. ProMaxx is working on an Oval Port head in the 280cc range, a 337cc, and 367cc. Yes, the ProMaxx heads are a copy, but so is just about every other head on the market. 6 valves. Shop the Best available ProMaxx Project X Series Small Block Chevy Aluminum Cylinder Heads parts at the Guaranteed Lowest Prices! High Performance Parts Delivered Fast. AFR - Airflow Research 1194 - SBC 227cc Angle Plug Heads spread port exhaust 64cc chambers bare heads (0) $1,211. If I was a 540 or 572, then rec. I had sent We knew the stock heads were restricting the combination, but didn’t know how much until we installed the CNC-ported heads from ProMaxx. Afr's or twisted wedge heads are the only way to go. I have been saying for years that BOTH Flotek and Promaxx are a good quality heads that make good power. Part Number: PMX-2168. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque . My Reviews; My Questions; My Garage; Sign In; Career Opportunities Find PROMAXX Performance Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! SBC CYLINDER HEADS PAIR. 383. Promaxx Performance. 21 out of 5 stars 63 Customer Reviews Assembled, Aluminum, 64cc Chamber, 185cc Intake, Angle Plug, Hyd, Flat, Chevy, SBC, Pair. Estimated Ship Date: Jan 14, 2025. $1,429. 0 gained a 100 horsepower. Ultra-smooth 356-T6 Aluminum Casting; Product Reviews. The ProMaxx heads respond to the same things that any production head respond to; some attention to detail. . After installation, the power output of the 393 soared to 558 hp at 6,400 rpm and 512 lb-ft of torque at 5,000 rpm. 5 out of 5 stars. southcross2631, Feb 15, 2020. Part Number: PMX-9186S. 00 This is where we will put the review of the head for the board. 575 Hyd Flat Tappet: 9183HR: 183 Maxx SBC Assy Hyd Roller: Straight: 64: 2. the guy had done saw cuts showing the ports and had tested the materail. The CNC-ported, 340cc versions from ProMaxx featured a 2. I went with a Dart set of heads in at around $1000. 575 Hyd Flat Tappet: 9200HR: 200 Maxx SBC Assy Hyd Roller: Straight: 64: 2. Beyond that information, it just starts to become a personal chice, along with all the other build parameters and your budget. 575 Hyd Flat Tappet: 9217S: Project X 215 SBC Hyd Roller: Straight: 64: 2. 190 Maxx SBC Bare: Straight: 64: 2. $1,287. 00 In Stock: Quantity Detailed Description: ProMaxx Flo Tek heads look good and have good reviews. TheZaZ Discussion starter. 0 Aluminum Diesel 18MM $ 1,431. Don’t let the size fool you, flowing over 260 cfm, this head makes real power. 600. 38 out of 5 stars. This head has produced over 5oo hp on pump gas and mild cam . Does anyone have any first hand They are an offshore-sourced cylinder head casting, like the Promaxx offerings and all the cheaper options, but AFR puts decent quality valvetrain components (including I needed a good street performance head for my roller cam 355 that wouldn't break the bank, be too large port wise, or fit poorly. A 416 is a pretty popular build for a SB. Just wondering what opinions are on promaxx project x heads? I think they are afr copies, but that 215cc head looks very promising. ProMaxx makes a good head, it's been discussed a few times over on the SpeedTalk forum, which is more of an engine builder, head porting specialist, machinist frequented board. Not enough to sway me based on reviews of quality and some other intangibles listed on this thread. 2. I think both Banghart Diesel & Performance put down 355hp/659tq through a set of ProMaxx heads recently and a bunch of other parts from us. a few of the custom head porters I have a pair of Promaxx for sbc and was really impressed with their construction. PROMAXX Performance Project X Small Block I give an honest review of the Promaxx Project X 215cc head. The economical "As-Cast" aluminum versions feature I give real flow numbers and review the Promaxx BBC 317cc head. com/product/ 5 I have been looking on Skip Whites web site and am considering a set of promaxx 185 64cc aluminum cyl heads for a hyd roller 383. Link to preorder book:https://weingartnerracing. Don't need 7 or 800 horse. Project X SBC 185 (SOLD IN PAIRS) $ 1,069. PROMAXX Performance Project X Small Block Chevrolet Cylinder Heads 9186S PMX-9186S. Mine were warped a little, I worked at an engine shop and never seen a set of aftermarket heads be good from the box from Eldebrock to AFR to Promaxx etc. The options may be chosen on the product page Performance. The new SBC heads and the new FE head are both very nice pieces. 575 in. 60/72cc Angle Plug Bare. ProMaxx 9196A Project X Cylinder Head Features: Fully assembled with valve springs, steel valve spring retainers, Viton valve seals, 3/8 in. 500 and 4. 2180 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads is rated 5. Additional information. No major work was done to these other than a basic gasket match job. There is a series of 6 videos in which a head porter dissects this head on YT as well. Applications Free Shipping - PROMAXX Performance Freedom Series Small Block Chevy Cylinder Heads with qualifying orders of $109. The ProMaxx 723-9183 cylinder head does not work on a '93 LT1. 36 - 60', 5. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: LASTCALL ProMaxx BBC Head Review Jump to Latest 21 - 40 of 111 Posts. $20 Off $250 / $40 Off $500 / $80 Off $1000 - Use Promo Code: CYBER I talk about the promax small block Ford 185 cc cylinder head and show the flow numbers. 250" and 1. Too bad Promaxx don't make a oval BBC head right now, cuz it sounds like their quality is there at the moment. Reactions: Hink, jrsavoie, n8in8or and 4 others. Certainly tfs heads when they work with rest of build do seem like a These are apparently the ProMaxx head among many others Steven performance cylinder head Naturally Aspriated 450 SBC - 915 HP / 714 lb-ft 3370 lbs 1. Fully CNC’d runners and chambers designed and ported in the USA. I know that doesn't mean much, but everything I've been finding on promaxx is good. 3. Project X 215 SBC Hyd Flat Tappet: Straight: 64: 2. Small Block Chevrolet (SBC) Cylinder Heads available in a large range of valve sizes to suit 185cc, 190cc, 195cc, 215cc & 225cc Intake port volumes to either a 64cc or 72cc Exhaust port volume. ProMaxx 9207 Project X Aluminum Cylinder Head Features:Fully assembled with I would say promaxx are tempting based on these items listed. Estimated Ship Date ProMaxx BBC Head Review Jump to Latest 101 - 111 of 111 Posts. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque ProMAXX Cylinder Heads, SERIES ONE 185 SBC CAST IRON . 400-226, . Most cylinder head makers are offering their castings in raw or semi-finished forms. 00 – $ 2,007. Date PROMAXX Performance Project X Small Block Ford Cylinder Heads. 200 Maxx SBC Assy: Straight: 64: 2. Free Shipping - PROMAXX Performance Freedom Series Small Block Chevy Cylinder Heads with qualifying orders of $109. Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. Skip the cable setup & start watching YouTube TV today–– for free. 194 posts · Joined 2002 Add to quote; Only show this user #1 · Feb 12, 2015. I review promaxx project x 185cc head and flow it. The ProMaxx cylinder head is not drilled for 400 blocks. PROMAXX Performance Maxx Series Small Block Chevy Cylinder Heads 92002AHR Cylinder Head, Maxx Series, 200cc Intake Runner, Aluminum, Assembled, 72cc Chamber, Pair Part Number: PMX-92002AHR bvseo-REVIEWS; bvseo-PRODUCT; bvseo-msg: The resource to the URL or file is currently unavailable. Horsepower costs money. 185cc intake runners; 202/1. 300 intake compared to the AFR 335 with 2. Spring Options: Combustion Chamber Size: Plug Option: Valve Option: Reviews Write a Review. Always check Seems a lot hear want to not only shit on "china" heads and also group them all together. Reviews; Q & A; 200cc Intake Runner. This new foundry that ProMaxx is working with makes nice stuff from everything we have been sent. 36 Eaton Posi, Moser Axles, , The ProMaxx MAXX Series Small Block Chevy Aluminum Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. 30. 36 Eaton Posi, Moser Axles, , E-Tec 170s then AFR CNC 195s Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. would like to ask some of the pro guys to check it out and see what they think of them. ProMAXX Cylinder Heads, MAXX 200 SBC. bvseo-REVIEWS; bvseo-PRODUCT; bvseo-getContent Asked by: Big B. Date published: 2022-11-17. 6. 93 @ 116. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and The 185cc series 1 heads are perfect for that budget build. Part Number: PMX-9217S. $5 Off Your $100 Mobile App Purchase - Get the App I just built a 355 with ProMaxx Maxx 183 heads. AFR . Estimated Ship Date: Oct 8, 2024 if ordered today. Rockwell test Head CC Chamber CC Intake and Exhaust Runners Check Seat concentricity and valve guide clearance as shipped Flow test head out of the box with 2. Their 185cc heads out perform the dart shp 200 heads and comparible edelbrock heads. The promaxx are a knock off of the Brodix ik heads. Explore the superior performance of ProMaxx 2169, the ultimate choice for 185 SBC heads. 00. SlowBoat Member. they just closed down and Promaxx Performance continues to evolve with the Project X lineup and has raised the bar on the competition. 0 HO shortblock with stock replacement pistons, FTI 223/227 @ . 100 on the Find PROMAXX Performance Project X Small Block Chevrolet Cylinder Heads 215cc Intake Runner Volume (cc) and get Free Shipping on Orders Over $109 at Summit Racing! PROMAXX Performance Project X small block Chevrolet cylinder heads have the right stuff to perfectly fit your budget build with abundant power. I think they had one thing on mind making a metal that would work on a SBC. One young dude at promax say i could get away with 90 psi. Flow Data. I agree with you Adger, I too think to go conservative and not go too big. 7 MPH - 1/8th. Street Edge 10" 2800, 8. yapfrzt cbpuw oidoj qgzunrg togfwjb bnwgv yds mno ufm vqiu