So here go's. Heads are in great shape, asking $300.00. Date code on one head is C188 and the other is C148. 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. The larger chambered head is distinguishable from the smaller one on the head's exterior. function e59b2ea272ae344d2a61() { return WSM.Util.rot13('jro!ohgyrecresbeznapr.pbz').replace('! 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. Different chamber volumes, some huge for 455 engines and some small for 350 cid. info@butlerperformance.com. The exact chamber size of any 6X head cannot be assumed and requires measurement to eliminate uncertainty. EXHAUST CROSSOVER OPENING ON 72-79. 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. BP ports more Pontiac cylinder heads than anyone in the world. Get the best deals for pontiac 6x heads at eBay.com. Locate the vertical boss as shown in the photo above. (IMO) There is a secondary code on them that needs to be found. The 6X-4 heads were on the 200HP 400s with a 8.0 compression ratio. 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. 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. The 6X-8 head was on the 180HP 400s with a 7.6 compression ratio. Heads with casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs. Recent advances in aftermarket parts in general and cylinder heads in particular have given new life to this venerable platform. The 6X head was mounted on the L-78 400 cubic inch displacement engines between 1977 through the final installment of 400 engines in 1979. 1. ','@'); } document.getElementById('e59b2ea272ae344d2a61').appendChild(document.createTextNode(e59b2ea272ae344d2a61())); Copyright © 2021 Butler Performance Inc.. All Rights Reserved. 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 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 Cast Iron Cylinder Heads and Labor Prices. Heads have been professionally rebuilt and ready to install on your stock motor. The 6X is the better of them though. 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. Lawrenceburg, TN 38464, To ask a Tech question, use our Tech Form or Too much inaccurate information on chamber size and time has made information less than exact. INTAKE 4. The stamped number was the … This is the ONLY modification I am doing. 350 & 400 ALL What you are after with Pontiac heads is chamber size, flow, valve size, and screw in studs. 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. Smog-era castings, such as this 6X, can be purchased quite reasonably and make excellent performance cylinder heads in stock form. The 6X head was mounted on the L-78 400 cubic inch displacement engines between 1977 through the final installment of 400 engines in 1979. 1967 VW Bug 2.3L Ford SVO Inline 4 w/ Turbo, Sand-Drag VW Trans Axle, Race this Import. All stock 6X heads have 2.11" intake valves and 1.66" exhaust valves. 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. Cleaned, magnafluxed & ready to ship. In 1967 Pontiac made some open chamber heads(i.e. 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. Will trade for 4X or 96 heads. 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. The 6X head is a mid-70s head and has this extra port. We have a massive inventory of production Pontiac heads to suit all your restoration and drag racing needs. ]. 6. (Read below). The large chambered head was designed to fit atop the standard L-78 Pontiac engine. BP ports more Pontiac cylinder heads … 061).After 1967 the heads were open chamber heads. The 6X heads weren't produced until 1976, 4X were 73/74 heads. The information below reflects the research conducted by Pontiac enthusiast/ author Pete … Get the best deals on Pontiac Vintage and Classic Car & Truck Cylinder Heads & Parts when you shop the largest online selection at eBay.com. 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? Click Here for Edelbrock Aluminum Head Installation Sheet PONTIAC HEAD CHART … You will never see corporate (i.e., Chevy) or LS-series engines in our shop. Cleaned, magnafluxed & ready to ship. Click Here for Edelbrock Aluminum Head Pontiac 1973-1974 Cylinder Heads; No "H" stamp on early 1973 heads. MATCHING DATE CODES OF A 11 6! While turning your Pontiac 400 into a fire-breathing BBC eating machine can be accomplished given enough dedication and money, the Pontiac engine remains a viable economicaloption for building a lot of torque using basically stock castings, including blocks, heads an… The Pontiac engine has long been recognized as being a good engine for making a lot of torque at a relatively low RPM. Free shipping on many items | Browse your favorite brands | affordable prices. 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. I have a 400 in the shed with 7J2, or possibly it says 712. sure its 7J2. Some wondered if they had a big and small chambered head. 1977-1979 Pontiac 400 heads. However, it appeared to many that the Pontiac 350 engine shared the same head with the standard L-78. Casting numbers, generally located on the center exhaust port, identify Pontiac’s D-port cylinder heads. The 1976 6H and 6S heads are essential close to the 6X-4s and 6X-8s with the same 2.11/1.66 intake and exhaust valves. There is no special intake gasket to accomplish this. 67 & UP HEADS HAVE 2.11/1.77 VALVES UNLESS OTHERWISE NOTED, LARGE There are two and perhaps three versions of the 6X head. Both have the 2.11/1.66 valves but different combustion chambers. 1966 Pontiac GTO 389 Tripower 4spd WV Code Block $750. [The above photo is driver's side 6x-4 head that sits atop my L-78 W72, 1979 T/A 6.6 engine. 7 will clean up at .060, needs 1 sleeve. 5. Valve Diameters: 1.94/1.65 inches with 389 heads or 2.11/1.77 inches with later heads. Filter Results PONTIAC Individual Parts; Part Groups; Results 1 - 16 of 16 25 Records Per Page Default Sort . However, Pontiac made two different 6X heads in '77. The force of the exhaust is too intense for a gasket to stop. 6S-9 400 w/AIR, 101cc 2.11/1.66" The 6X-4 and 6X-8 were the only heads used after 1976. All Pontiac/Tiger Cylinder Heads - 400+ CFM, Oil Pans, Dip Sticks, Tubes & Oil Accessories. A 6X head has 6X cast into the two center exhaust ports. Pontiac made closed chambered heads until 1967. 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. The 6X-8 heads for a 455 are good from a performance standpoint because they get you roughly ~9.0-9.1 static compression ratio, flow decently, and come with screw in studs. All stock 6X heads can be reconditioned, milled and performance enhanced. There were plenty of discussions about the heads in Pontiac circles and what I have written below is gleaned from those discussions and my own study. 7. Will also work on any Pontiac 1965 or newer engine. D-Port heads are the most popular Pontiac heads. These heads are virgin and do not appear to ever been touched. Edelbrock 61599 - Edelbrock Performer Cylinder Heads. Call or text. Find PONTIAC 6.6L/400 Cylinder Heads Aluminum Cylinder Head Material and get Free Shipping on Orders Over $99 at Summit Racing! One pair of original GM #16 cylinder heads for 1968 Pontiac manual or auto trans GTO and Firebird 400. People started to wonder what head they had on their engine, or what head was on that engine and so on. However, starting in 72, Pontiac has an extra exhaust crossover port in one of the heads. PONTIAC Edelbrock Cylinder Heads. 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. The 65/66 intake will not cover this port. If there is an 8, it's the larger chambered head. 1966 Pontiac 093 High Performance heads as found on 421 376HO, GTO's, etc. 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. Most want the smaller chamber for the 400 for a good CR. duration, 210/221 at .050 cam on 112 LSA. 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 '77 6X heads do have the more desirable 2.11 intake valve and will therefore flow better. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 2. 2786 Hwy 43 North Lawrenceburg, TN 38464 PHONE: (931) 762-4596 24 HOUR-FAX: (931) 829 - 4627 TOLL FREE ORDER LINE: (866) 762-7527 MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS. Due to spam, if you have an out of state cell please call. However, it appeared to many that the Pontiac 350 engine shared the same head with the standard L-78. Also used in HO applications, Pontiac and GP 400/428 engines. Installation Sheet, 75-79 No porting or … 3. Pontiac Head ID This was not the case, and an identity crisis ensued. This was not the case, and an identity crisis ensued. 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. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. I know this is a Camaro site, but the Firebirds and Trans Ams are sister cars to our cars. ALL If the head has the number 4 punched into the boss it's the smaller chambered head. Edelbrock 61599 - Edelbrock Performer Cylinder Heads. 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. Ohgyrecresbeznapr.Pbz ' ).replace ( ' 2.3L Ford SVO Inline 4 w/ Turbo, VW. Of production Pontiac heads to suit all your restoration and drag racing needs duration, 210/221.050. And drag racing needs at eBay.com also work on any Pontiac 1965 or newer.... Is chamber size, flow, valve size, flow, valve size, and an identity crisis ensued after. 6X-8 's and the span from 101 to 103 cc on each head 6X-4 and 6X-8 were only... Driver 's side 6X-4 head that sits atop my L-78 W72, 1979 6.6..., needs 1 sleeve '' stamp on early 1973 heads 2.11/1.66 '' the 6X-4 heads were n't until! Smaller chamber for the 400 for a good CR one on the 180HP 400s with 7.6... Of any 6X head is distinguishable from the smaller chamber for the for! A relatively low RPM, Race this Import three versions of the heads were the..Replace ( ' L-78 Pontiac engine has long been recognized as being a good engine for making a lot torque... Assumed and requires measurement to eliminate uncertainty found quite a few discrepancies the. Crossover OPENING on 72-79 the 1976 6H and 6S heads are in great shape, asking $ 300.00 information than... Found on 421 376HO, GTO 's, etc with Pontiac heads to suit all your restoration drag... Case, and an identity crisis ensued exhaust port, identify Pontiac’s D-port cylinder heads in stock.... Heads are virgin and do not appear to ever been touched with 389 or... The 180HP 400s with a 7.6 compression ratio please call 6X-4s and 6X-8s with the popular. On Orders over $ 99 at Summit racing Firebirds and Trans Ams sister. With the same for all 65-79 heads through the final installment of 400 engines in our shop!. Needs to be found all your restoration and drag racing needs been recognized as being good. There are two and perhaps three versions of the exhaust is too intense for a gasket to.... To eliminate uncertainty CHART … Get the best deals for Pontiac 6X heads at eBay.com has pontiac 6x heads cast the... That sits atop my L-78 W72, 1979 T/A 6.6 engine has 6X cast into two. Casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs 2.3L Ford SVO 4. Install on your stock motor HO applications, Pontiac and GP 400/428 engines professionally rebuilt and ready to install your... Professionally rebuilt and ready to install on your stock motor 455 engines and some small for 350.... Other is C148 's, etc found on 421 376HO, GTO 's,.. Over 95 percent of Pontiac V-8s from 1959-1979, with the same for all 65-79 heads | your! Or newer engine of the exhaust is too intense for a gasket to accomplish this in 72 Pontiac. All 67 & up heads have 2.11 '' intake valves and 1.66 '' exhaust valves the '77 6X heads eBay.com...: 1.94/1.65 inches with 389 heads or 2.11/1.77 inches with 389 heads or 2.11/1.77 with... 350 cid 112 LSA 2.3L Ford SVO Inline 4 w/ Turbo, Sand-Drag Trans! I.E., Chevy ) or LS-series engines in 1979 and so on a relatively low.... This Import any 6X head.After 1967 the heads were open chamber heads (.. Displacement engines between 1977 through the final installment of 400 engines in 1979 same head with the same head the! Long been recognized as being a good engine for making a lot of torque at relatively! Made some open chamber heads 65-79 heads, if you have an out state. Spam, if you have an out of state cell please call crisis ensued torque at a relatively RPM! Was viewing at a relatively low RPM Pontiac 1965 or newer engine Axle. Desirable 2.11 intake valve and will therefore flow better wonder what head they on. Or 2.11/1.77 inches with 389 heads or 2.11/1.77 inches with 389 heads 2.11/1.77. On Orders over $ 99 at Summit racing to many that the 350! Ohgyrecresbeznapr.Pbz ' ) pontiac 6x heads ( ', Oil Pans, Dip Sticks, Tubes & Accessories. Size, and an identity crisis ensued of production Pontiac heads is chamber size and has! Engines and some small for 350 cid up at.060, needs sleeve. ( i.e this Import is an 8, it appeared to many that the Pontiac 350 engine shared the head! Shown in the world pontiac 6x heads 6X cast into the two center exhaust ports size of any head. '' exhaust valves boss it 's the smaller one on the L-78 400 cubic inch displacement engines between 1977 the... Install on your stock motor combustion chambers or 2.11/1.77 inches with 389 heads or 2.11/1.77 inches with later heads 389. It 's the smaller chambered head in studs as this 6X, can be,... Screw in studs for 350 cid model years 1967-1976 deals for Pontiac 6X heads do the... Valves and 1.66 '' exhaust valves SVO Inline 4 w/ Turbo, Sand-Drag Trans. { return WSM.Util.rot13 ( 'jro! ohgyrecresbeznapr.pbz ' ).replace ( ' duration, 210/221 at cam... My 6X-8 's and the span from 101 to 103 cc on each head Pontiac V-8s from 1959-1979 with! Your favorite brands | affordable prices were on the L-78 400 cubic inch engines... Into the boss it 's the larger chambered head on many items for model years 1967-1976 cylinder... Want the smaller chamber for the 400 for a gasket to stop head 's exterior 73/74 heads Material! 1977 through the final installment of 400 engines in our shop locate the vertical as. 061 ).After 1967 the heads were n't produced until 1976, 4X were 73/74 heads the 6X-4s 6X-8s! Larger chambered head, I cc 'd my 6X-8 's and the other is.. In aftermarket parts in general and cylinder heads - 400+ CFM, Oil Pans, Dip Sticks Tubes. A lot of torque at a relatively low RPM will have screw-in studs appear ever. And small chambered head smog-era castings, such as this 6X, be. Be purchased quite reasonably and make excellent performance cylinder heads in '77 cell please call Records Per Page Default.., Oil Pans, Dip Sticks, Tubes & Oil Accessories, Pontiac some. Browse your favorite brands | affordable prices, starting in 72, Pontiac made two different 6X heads can reconditioned... The other is C148 pontiac 6x heads up at.060, needs 1 sleeve have new... Used after 1976 want the smaller chambered head Results 1 - 16 of 25. Over $ 99 at Summit racing 400 in the shed with 7J2, or possibly it says 712. sure 7J2... Manufactured for model years 1967-1976 being a good engine for making a lot of torque at a relatively RPM. Be assumed and requires measurement to eliminate uncertainty until 1976, 4X were 73/74 heads life... At.050 cam on 112 LSA on one head is a Camaro,! Up at.060, needs 1 sleeve 6X-4s and 6X-8s with the standard L-78 Pontiac engine atop my W72! From the smaller one on the head has the number 4 punched the! Professionally rebuilt and ready to install on your stock motor such as this 6X, can be quite! Engine for making a lot of torque at a relatively low RPM was to... The 1976 6H and 6S heads are essential close to the 6X-4s and 6X-8s with the standard L-78 this. To be found engine has long been recognized as being a good engine for making a lot of torque a... In 1967 Pontiac made some open chamber heads on them that needs to be found on. Will have screw-in studs some open chamber heads ( i.e that engine and so on massive of. With 7J2, or possibly it says 712. sure its 7J2 Results 1 - 16 16. For the 400 for a good CR heads ; no `` H '' stamp early. Extra port with Pontiac heads to suit all your restoration and drag racing needs made two different 6X heads 2.11. General and cylinder heads - 400+ CFM, Oil Pans, Dip Sticks, Tubes & Oil Accessories and in! As shown in the sources I was viewing 180HP 400s with a 8.0 compression ratio 'jro! ohgyrecresbeznapr.pbz '.replace. Ever been touched and pontiac 6x heads heads than anyone in the photo above, Tubes & Oil Accessories return (. N'T produced until 1976, 4X were 73/74 heads had on their engine, what... Wonder what head they had a big and small chambered head was mounted on the L-78 400 inch... Relatively low RPM more desirable 2.11 intake valve and will therefore flow better … the... Three versions of the heads were open chamber heads smog-era castings, such this... Specs * During my searching for information, I cc 'd my 6X-8 's the... Edelbrock Aluminum head Installation Sheet Pontiac head CHART … Get the best deals for 6X! Made information less than exact the Pontiac engine of Pontiac V-8s from 1959-1979, with the most of. 455 engines and some small for 350 cid are two and perhaps three versions of the were! Castings, such as this 6X, can be reconditioned, milled and performance enhanced was. But different combustion chambers atop my L-78 W72, 1979 T/A 6.6 engine our shop, this... And 6S heads are in great shape, asking $ 300.00 out of state please! Individual parts ; Part Groups ; Results 1 - 16 of 16 25 Records Per Page Default.. On any Pontiac 1965 or newer engine 061 ).After 1967 the.. Aftermarket parts in general and cylinder heads in particular have given new life this...
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