Zz4
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,405
Likes: 4
From: Lorena Texas
Zz4
I am working on a 79. We broke the engine and will be installing a ZZ4 with fast burn heads. Needless to say the old style headers do not line up wityh the D port exhaust. Anyone know who makes a header for this style head for the 79? Thanks in advance.
Drifting
Joined: Jan 2001
Posts: 1,841
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From: Halifax, NS, Canada
Last edited by Binnie77; Jan 20, 2008 at 03:14 PM.
Melting Slicks
Joined: Dec 1999
Posts: 2,116
Likes: 156
From: Mid West
Cruise-In III Veteran
Dynomax sells a full length set that fits fine on ZZ4 heads. They have oval ports so they don't cover any of the exhaust port. You can get them at Summit Racing or Jegs.
Team Owner
Joined: Jul 2004
Posts: 40,248
Likes: 786
From: Redondo Beach, California
I was worried about the missmatch also. I had an opportunity to talk to an Edelbrock intake manifold designer. He said the mismatch would not noticeably affect engine power since the missmatch is so slight and the exhaust gas is so energetic. He said a missmatch would be a problem if it occurred between the cylinder head and the intake manifold.
I installed Hedman sidepipe headers. They are made for the 1969 Corvette engine. Anyhow I laid a D port gasket against the header flange. There was not really much of a missmatch. I got out a grinder and ground down the header flange to match the D port gasket. This worked very nicely. After grinding down the flange, I set the headers off to be coated with silver ceramic (Jet Hot).
I installed Hedman sidepipe headers. They are made for the 1969 Corvette engine. Anyhow I laid a D port gasket against the header flange. There was not really much of a missmatch. I got out a grinder and ground down the header flange to match the D port gasket. This worked very nicely. After grinding down the flange, I set the headers off to be coated with silver ceramic (Jet Hot).
