Quick question on headers
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
Quick question on headers
I have a 77, the last time I removed one of the exhaust manifolds, I believe they had squarish ports. I am unsure. I am thinking of getting some shorty headers. I see oval/rectangle/square/ and o shaped. On the 350's in the 77. What is the correct shape? Do not feel like removing an exhaust manifold just to check. Thanks....
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
The article in this link shows what your exhaust ports should look like.
http://www.stahlheaders.com/ports.htm
Scott
http://www.stahlheaders.com/ports.htm
Scott
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
This past Oct, I replaced the original exhaust with true duals straight back no cats. If I get shorty's, they will bolt right up. Otherwise I need to cut/fabricate. And also have to deal with ground clearence.
Burning Brakes
Joined: Nov 2008
Posts: 965
Likes: 28
From: Mt. Pleasant NC
If you look through most of these companies that sell headers and other high performance accessories(Summit, Jegs, etc), you'll see where they make headers for our C3's(68-82). They are a direct fit and the tubes are bent the correct way to clear certain parts in the engine bay. I started with a set of Dynomax headers. Those were a direct fit. Then I went with a set of Hooker Super Comp's which were a direct fit as well. And about 6 months ago, stepped up to a set of Hooker Super Comp's with the side pipes which were a direct fit as well. I think as long as you order for a 68-82, you'll find theres nothing to cut or fabricate. Ground clearance is not an issue either unless you've got your C3 really slammed to the ground. I actually use to have exhaust cut outs the dumped down and still had no clearance issues...
Race Director
Joined: Mar 2006
Posts: 14,112
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From: Florida
Most shorties create plug and plug wire clearance problems, worth spending more for the good ones.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Scott
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Le Mans Master
Joined: Jul 2000
Posts: 6,664
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From: columbia city in
when its time for new headers i will buy mcjackshttp://www.vetteheaders.com/servlet/...rvette+Headerslong tube may be better at high rpm ,but my car never sees over 5000 rpm.i like bolt in .
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
when its time for new headers i will buy mcjackshttp://www.vetteheaders.com/servlet/...rvette+Headerslong tube may be better at high rpm ,but my car never sees over 5000 rpm.i like bolt in .
Burning Brakes
Joined: Nov 2008
Posts: 965
Likes: 28
From: Mt. Pleasant NC
I say go to summit or jegs and order you a set of Hooker Super Comp's. No modifying needed, they are long tubes and have no fitment issues whatsoever. They come in black, chrome or ceramic and look good as well. They will work with factory heads and the best thing about them is later on, if you go to an aftermarket head(as I did) with larger intake/exhaust ports, they will still work as they have the largest tube diameter of any header on the market. Black are like $350/pair and ceramic I think is around $600/pair.
Last edited by austinseanchris; Aug 7, 2011 at 11:21 AM.
Thread Starter
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
I say go to summit or jegs and order you a set of Hooker Super Comp's. No modifying needed, they are long tubes and have no fitment issues whatsoever. They come in black, chrome or ceramic and look good as well. They will work with factory heads and the best thing about them is later on, if you go to an aftermarket head(as I did) with larger intake/exhaust ports, they will still work as they have the largest tube diameter of any header on the market. Black are like $350/pair and ceramic I think is around $600/pair.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
If you are really looking to install a set of heqaders on the cheap, this might be the way to go:
http://www.summitracing.com/parts/SUM-G9003/
http://www.summitracing.com/parts/BIG-10004FLT/
Shorty headers that will "just bolt right up" to your existing exhaust system are expensive, and don't flow very well. For $130.00 you can have full length headers, just install the headers and reducers, saw the exhaust pipes of in the appropriate spots, and use a short length of exhaust pipe that has the same I.D. as the O.D. of the reducer and exhaust system with a couple of clamps. Maybe someday you can have a muffler shop weld them together.
Scott
http://www.summitracing.com/parts/SUM-G9003/
http://www.summitracing.com/parts/BIG-10004FLT/
Shorty headers that will "just bolt right up" to your existing exhaust system are expensive, and don't flow very well. For $130.00 you can have full length headers, just install the headers and reducers, saw the exhaust pipes of in the appropriate spots, and use a short length of exhaust pipe that has the same I.D. as the O.D. of the reducer and exhaust system with a couple of clamps. Maybe someday you can have a muffler shop weld them together.
Scott