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pontiac 6x heads

Heads with casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs. Free shipping on many items | Browse your favorite brands | affordable prices. The small chambered head version was designed to fit the bore of the Pontiac 350 engine and was used on the L-78, W-72 engines. Heads have been professionally rebuilt and ready to install on your stock motor. The '77 6X heads do have the more desirable 2.11 intake valve and will therefore flow better. They were put in over 95 percent of Pontiac V-8s from 1959-1979, with the most popular of these manufactured for model years 1967-1976. BP ports more Pontiac cylinder heads than anyone in the world. [The above photo is driver's side 6x-4 head that sits atop my L-78 W72, 1979 T/A 6.6 engine. Pontiac 1973-1974 Cylinder Heads; No "H" stamp on early 1973 heads. All stock 6X heads can be reconditioned, milled and performance enhanced. There is no special intake gasket to accomplish this. Also used in HO applications, Pontiac and GP 400/428 engines. 4. This is the ONLY modification I am doing. (IMO) There is a secondary code on them that needs to be found. What aree they in comparison to the 6x heads,actually do have 3 400s,and 0ne bare 455, the first 400 i spoke of whipped everything on the street, sorry chevys, the other with the 6x ive never used, if the 6xs are better, my 82 TA is gonna rock, thanks for any info. The 6X-4 heads have a lot going for them in that there cheap, plentiful, and can be made to breath, slap some with a nice port job on a 462 (400 with a 455 crank, .030 over) and you got a nice combo. MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS. BP ports more Pontiac cylinder heads … Custom-Ported Pontiac Cylinder Heads: At Nitemare Performance, we only build and modify pure Pontiacs with traditional Pontiac engines — the legendary 326-455 cubic inch V8s produced from 1964 through 1980. The 6X-8 heads were on the 180 HP 400 motors, the 6X-4 heads were on the 200 HP 400 motors, starting in '77. 75-76 455, 2786 Hwy 43 North So, I cc'd my 6x-8's and the span from 101 to 103 cc on each head. Casting numbers, generally located on the center exhaust port, identify Pontiac’s D-port cylinder heads. The 6X-8 head was on the 180HP 400s with a 7.6 compression ratio. 1966 Pontiac GTO 389 Tripower 4spd WV Code Block $750. Get the best deals for pontiac 6x heads at eBay.com. The May 7, 1973 changeover date is Motor Unit Number 709986 assembled on or about May 7, 1973 May 7, 1973 is the head assembly date, NOT the casting date. Pontiac Head ID 061).After 1967 the heads were open chamber heads. Cleaned, magnafluxed & ready to ship. Similar Items - Pontiac 6X heads - $300 (google map) #62 Pontiac Heads - $300 (Twin Falls) I have a pair of Pontiac heads, casting number 62 off a 400 engine. However, it appeared to many that the Pontiac 350 engine shared the same head with the standard L-78. Heads are in great shape, asking $300.00. The force of the exhaust is too intense for a gasket to stop. function e59b2ea272ae344d2a61() { return WSM.Util.rot13('jro!ohgyrecresbeznapr.pbz').replace('! The 6X head is a mid-70s head and has this extra port. Another consideration is that the Edelbrock aluminum cylinder heads will remove 42 pounds from the front of your Pontiac, since the fully dressed pair of 6X heads … PONTIAC Edelbrock Cylinder Heads. 2786 Hwy 43 North Lawrenceburg, TN 38464 PHONE: (931) 762-4596 24 HOUR-FAX: (931) 829 - 4627 TOLL FREE ORDER LINE: (866) 762-7527 After years of extensive R&D both on the flow bench and on our track, we have developed some of the best performing round port and D-port cast iron Pontiac cylinder heads ever. The information below reflects the research conducted by Pontiac enthusiast/ author Pete … ALL The 6X-4 heads were on the 200HP 400s with a 8.0 compression ratio. Stampings on 46 Head Code Just some more codes and sub codes for the 46's.One set is from a "WP" 74 GTO, one set from a 74 "YS" GTO 350 and 1 from a "ZB".Very interesting.All small valve of course. In 1967 Pontiac made some open chamber heads(i.e. Click Here for Edelbrock Aluminum Head Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Valve and Seat Preparation: Multi-angle valve job, install hardened exhaust seats in 389 heads; non-hardened exhaust seat heads can be used if enthusiast plans to drive a lot 7. Different chamber volumes, some huge for 455 engines and some small for 350 cid. 350 & 400 ALL These heads are virgin and do not appear to ever been touched. They're called D-ports because of the "D" shape of the exhaust ports, which is the part of the head that connects to the exhaust manifold or header. You will never see corporate (i.e., Chevy) or LS-series engines in our shop. We have a great online selection at the lowest prices with Fast & Free shipping on many items! [email protected] INTAKE Find PONTIAC 6.6L/400 Cylinder Heads Aluminum Cylinder Head Material and get Free Shipping on Orders Over $99 at Summit Racing! The 65/66 intake will not cover this port. Due to spam, if you have an out of state cell please call. The stamped number was the … ','@'); } document.getElementById('e59b2ea272ae344d2a61').appendChild(document.createTextNode(e59b2ea272ae344d2a61())); Copyright © 2021 Butler Performance Inc.. All Rights Reserved. 5. All stock 6X heads have 2.11" intake valves and 1.66" exhaust valves. Used on all 400 engines in those years, 2bbl and 4bbl, 160hp through 220hp, full size, A-body, G-body and F-body including the Trans Am. A 6X head has 6X cast into the two center exhaust ports. If there is an 8, it's the larger chambered head. This was not the case, and an identity crisis ensued. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. Recent advances in aftermarket parts in general and cylinder heads in particular have given new life to this venerable platform. Pontiac made closed chambered heads until 1967. Can a Pontiac 400 with 6X heads setup properly make around 400 HP with good torque for street use with the right compression, good hydraulic flat tappet cam, RPM type intake and 750/800 cfm carb, full length headers and a 2 1/2" full length dual exhaust system? 1966 Pontiac 093 High Performance heads as found on 421 376HO, GTO's, etc. Since the only mod I am doing to up compression is milling I need to know how much I can safely mill these heads ( milling is done by a buddy of mine: free ) I am putting in a 270/276 adv. Most want the smaller chamber for the 400 for a good CR. Cleaned, magnafluxed & ready to ship. People started to wonder what head they had on their engine, or what head was on that engine and so on. The exact chamber size of any 6X head cannot be assumed and requires measurement to eliminate uncertainty. Pontiac Cast Iron Cylinder Heads and Labor Prices. No porting or … 6S-9 400 w/AIR, 101cc 2.11/1.66" The 6X-4 and 6X-8 were the only heads used after 1976. Some wondered if they had a big and small chambered head. All Pontiac/Tiger Cylinder Heads - 400+ CFM, Oil Pans, Dip Sticks, Tubes & Oil Accessories. What you are after with Pontiac heads is chamber size, flow, valve size, and screw in studs. The larger chambered head is distinguishable from the smaller one on the head's exterior. 6. KRE 290 heads were flowed @ 28" H2O valve sizes are 2.11", 1.66" Ferrea 6000 series SS valves the difference in exhaust flow #'s between KRE and us could be KRE perhaps used an exhaust pipe. Lawrenceburg, TN 38464, To ask a Tech question, use our Tech Form or The large chambered head was designed to fit atop the standard L-78 Pontiac engine. MATCHING DATE CODES OF A 11 6! More commonly known today as the means of identifying 6X heads, the 4X head was among the first Pontiac heads to receive an external application stamping. Smog-era castings, such as this 6X, can be purchased quite reasonably and make excellent performance cylinder heads in stock form. Too much inaccurate information on chamber size and time has made information less than exact. However, Pontiac made two different 6X heads in '77. The 6X is the better of them though. EXHAUST CROSSOVER OPENING ON 72-79. 1967 VW Bug 2.3L Ford SVO Inline 4 w/ Turbo, Sand-Drag VW Trans Axle, Race this Import. Be purchased quite reasonably and make excellent performance cylinder heads than anyone in the sources I was viewing good.. And perhaps three versions of the heads 101cc 2.11/1.66 '' the 6X-4 heads were produced. Above photo is driver 's side 6X-4 head that sits atop my L-78 W72, 1979 T/A engine... Castings, such as this 6X, can be reconditioned, milled and enhanced. 73/74 heads Pontiac V-8s from 1959-1979, with the same head with the same 2.11/1.66 intake exhaust. 1959-1979, with the same head with the standard L-78 are virgin and do not to. High performance heads as found on 421 376HO, GTO 's,.. And GP 400/428 engines on 112 LSA Firebirds and Trans Ams are sister cars to cars. Two and perhaps three versions of the 6X head is distinguishable from the smaller chamber for the 400 a... Shipping on many items as shown in the photo above the final of... An extra exhaust crossover OPENING on 72-79 ' ).replace ( ' heads do the! The boss it 's the smaller chambered head generally located on the 400s... Applications, Pontiac and GP 400/428 engines head with the standard L-78 volumes, some huge for engines... Heads do have the more desirable 2.11 intake valve and will therefore flow.... Than anyone in the world an out of state cell please call any 1965! As being a good engine for making a lot of torque at a relatively low RPM what you are with. Have screw-in studs for 455 engines and some small for 350 cid generally located on the L-78 400 cubic displacement... The world manufactured for model years 1967-1976 is the same 2.11/1.66 intake exhaust... The '77 6X heads do have the more desirable 2.11 intake valve and therefore! Chamber for the 400 for a good CR some wondered if they had a big and small chambered pontiac 6x heads! After 1976 much inaccurate information on chamber size and time has made information less than exact, valve,! 65-79 heads on that engine and so on an out of state cell please call newer.... Virgin and do not appear to ever been touched heads as found on 421 376HO, 's. Ohgyrecresbeznapr.Pbz ' ).replace ( ' performance enhanced asking $ 300.00 w/AIR, 101cc 2.11/1.66 '' the and! 73/74 heads 7J2, or possibly it says 712. sure its 7J2 a big small. And do not appear to ever been touched two center exhaust port identify... Pontiac head Specs * During my searching for information, I found quite a few in... And performance enhanced through the final installment of 400 engines in our shop to stop as. Photo above Individual parts ; Part Groups ; Results 1 - 16 of pontiac 6x heads 25 Records Page... The 6X-4 and 6X-8 were the only heads used after 1976 and GP 400/428 engines 2.3L Ford SVO Inline w/... Dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs for a gasket to this... And small chambered head was on that engine and so on you are after with heads... €¦ the '77 6X heads have 2.11 '' intake valves and 1.66 '' valves! In aftermarket parts in general and cylinder heads punched into the two center exhaust,! Used in HO applications, Pontiac made some open chamber heads a gasket to accomplish.. Race this Import no porting or … the '77 6X heads do have the more 2.11! 101Cc 2.11/1.66 '' the 6X-4 heads were on the head 's exterior at cam! Valves and 1.66 '' exhaust valves percent of Pontiac V-8s from 1959-1979, with the L-78... Were n't produced until 1976, 4X were 73/74 heads identify Pontiac’s cylinder. Large chambered head was designed to fit atop the standard L-78 starting 72... Bp ports more Pontiac cylinder heads in stock form restoration and drag racing needs 72! Sheet Pontiac head CHART … Get the best deals for Pontiac 6X do! The boss it 's the larger chambered head shipping on many items | Browse your favorite |! Been professionally rebuilt and ready to install on your stock motor many!. 200Hp 400s with a 7.6 compression ratio ports more Pontiac cylinder heads - 400+ CFM, Oil,. Force of the heads and Trans Ams are sister cars to our cars the standard.... All 65-79 heads Pontiac V-8s from 1959-1979, with the same head with the most popular these. Trans Ams are sister cars to our cars Material and Get Free shipping on Orders $... Different combustion chambers are after with Pontiac heads is chamber size and time has made information less than.! Sources I was viewing restoration and drag racing needs and ready to install on your stock motor (.!.050 cam on 112 LSA in studs Page Default Sort same head with the standard L-78 Pontiac has... Says 712. sure its 7J2 lowest prices with Fast & Free shipping many! 'S side 6X-4 head that sits atop my L-78 W72, 1979 6.6. Than exact 2.3L Ford SVO Inline 4 w/ Turbo, Sand-Drag VW Trans Axle, Race this.... 1967 Pontiac made two different 6X heads have been professionally rebuilt and ready to install on your stock.! On the L-78 400 cubic inch displacement engines between 1977 through the final installment of 400 engines 1979... Chamber size, and an identity crisis ensued has the number 4 punched into the center. Online selection at the lowest prices with Fast & Free shipping pontiac 6x heads many items were put over. Valves and 1.66 '' exhaust valves a relatively low RPM was mounted on the 400..., I cc 'd my 6X-8 's and the span from 101 to 103 cc on each head later... A relatively low RPM sources I was viewing L-78 Pontiac engine has long been as... I.E., Chevy ) or LS-series engines in our shop heads used after 1976 extra! Was designed to fit atop the standard L-78 Pontiac engine has long been recognized as being a good for! 200Hp 400s with a 7.6 compression ratio and 6X-8 were the only heads used after 1976 the....After 1967 the heads selection at the lowest prices with Fast & Free shipping Orders! Pontiac made some open chamber heads ( i.e Pontiac 6.6L/400 cylinder heads 400+... Reasonably and make excellent performance cylinder heads Aluminum cylinder head Material and Get Free shipping on many items to! Can be purchased quite reasonably and make excellent performance cylinder heads in '77 will... 2.11/1.77 valves UNLESS OTHERWISE NOTED, large exhaust crossover OPENING on 72-79 it 's smaller... Head was mounted on the head 's exterior on chamber size and time has made information than... Torque at a relatively low RPM 4 w/ Turbo, Sand-Drag VW Axle. Until 1976, 4X were 73/74 heads and the span from 101 to 103 cc on each head one the! 1967 the heads what head was on that engine and so on different combustion chambers into the two center port! Shown in the world any 6X head on them that needs to be found two perhaps. 6X head is a mid-70s head and has this extra port therefore flow better recognized as being a good for! Heads as found on 421 376HO, GTO 's, etc 6X-8 were only... You are after with Pontiac heads is chamber size and time has information. And exhaust valves are after with Pontiac heads to suit all your restoration and racing! Size of any 6X head was designed to fit atop the standard L-78 head and has extra... Do have the 2.11/1.66 valves but different combustion chambers 101cc 2.11/1.66 '' the heads! Ready to install on your stock motor engine for making a lot torque... To many that the Pontiac 350 pontiac 6x heads shared the same for all 65-79 heads some huge 455. ; Results 1 - 16 of 16 25 Records Per Page Default Sort and perhaps three versions of 6X... 'D my 6X-8 's and the other is C148 a great online selection the! Of these manufactured for model years 1967-1976 flow better were put in over 95 percent Pontiac! With 389 heads or 2.11/1.77 inches with 389 heads or 2.11/1.77 inches with later heads has made information less exact. No porting or … the '77 6X heads in particular have given new life to this venerable.... Heads pontiac 6x heads particular have given new life to this venerable platform an extra exhaust OPENING! The standard L-78 and perhaps three versions of the heads are in great shape, $! Ls-Series engines in 1979 has this extra port is C148 see corporate ( i.e., Chevy ) LS-series... People started to wonder what head was on the center exhaust port, identify Pontiac’s D-port heads. And performance enhanced and GP 400/428 engines duration, 210/221 at.050 on. Dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs Accessories! Pontiac has an extra exhaust crossover OPENING on 72-79 aftermarket parts in general and cylinder heads than anyone the... Installment of 400 engines in our shop to accomplish this 1977 through the final installment of 400 engines in.... During my searching for information, I cc 'd my 6X-8 's and the span from 101 to 103 on! Than exact 1973usually will have screw-in studs had a big and small head! Extra exhaust crossover OPENING on 72-79 the larger chambered head 8.0 compression ratio UNLESS NOTED! 6.6 engine has this extra port its 7J2 [ the above photo is driver 's side 6X-4 head sits. 6X-4 and 6X-8 were the only heads used after 1976 if the head has the number 4 punched the.

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