when we raced metrics ( g bodies) we had to have cast iron manifolds so we used truck manifolds that have 3 studs, they are large and breath better than the G body stock manifolds and had no EFE valve so each manifold use the same gasket
Cast Iron Exhaust Manifolds without EFE
- Thread starter Michaelweez
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Thanks, I did find that website previously but figured just removing the flapper and shaft was cheaper. I don't mind having to modify the exhaust, the system as it sits seems to hang a bit low so I'm trying to get it tucked up a bit higher if at all possible.
Here are some shorty's. I'm sure you could also get them coated or stainless.
https://m.summitracing.com/parts/hok-2466hkr/none/images
https://m.summitracing.com/parts/hok-2466hkr/none/images
I used 3-bolt truck manifolds from a 74 Chevy truck with 2-1/2" dual exhaust. You'll have to change the flanges to the 3-bolt style, but they got me a 14.67 quarter in a SBC 400. Never blew a header gasket - never had any.
Thanks guys for the info about the truck manifolds, wish I had inquired about this before I purchased and cut up the 2 bolt flange downpipes!
Here is the pics of my 2 sets of manfiolds I picked up if I'm 100% on not using the headers
These are the over port 3 studs. The guy at the swap meet said they came off a car. It has a vacuum EFE that is untouched.
These are the one I will be using. These were on a mid '70s car. I moded the EFE for these since the spring is shot.
These are the over port 3 studs. The guy at the swap meet said they came off a car. It has a vacuum EFE that is untouched.
These are the one I will be using. These were on a mid '70s car. I moded the EFE for these since the spring is shot.
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