Exhaust Manifold Summary

[MalibuRacing]

Exhaust Manifolds:

Since this is going to be a daily driver for my (new driver) 16 year old son, I'm not interested in making HP, so I decide to use "stock" F-body (Camaro or Firebird) cast iron manifolds. I used manifolds off of a 2002 Camaro. There are a couple gotcha's on using these, but not biggies. First, you have to plug the O2 sensor bung on the driver side manifold, because there is not enough room to install it in the manifold. You can get them from any exhaust shop cheap. Next, is the driver's side uses a funky collector flange. It mates to a one-piece pipe, catalytic converter that you may be lucky enough to find, but I had a flange made by a local machine shop for very cheap using the gasket as the template. Also, you will need to plug the EGR holes in the tops of the manifold. I did this with some scrap metal and got the gaskets from the parts store for very cheap.

Passenger side

Driver side

Funky triangular flange on the driver side manifold

 

[79loserbluebu]

Did you by any chance try out the truck manifolds? I saw in the other thread you had you said that you've heard they wouldn't fit. I've also heard that "supposedly" they flow better then many aftermarket headers. Then again, you did say you aren't really worried about HP, just seeing if the truck ones would clear the firewall, steering shaft, etc.

 

[MalibuRacing]

Did you by any chance try out the truck manifolds? I saw in the other thread you had you said that you've heard they wouldn't fit. I've also heard that "supposedly" they flow better then many aftermarket headers. Then again, you did say you aren't really worried about HP, just seeing if the truck ones would clear the firewall, steering shaft, etc.

The passenger side would fit. The drivers side would not, no way to make it fit. It's been a while, but I believe it was pointed directly at the frame. Anyway, it was a no-go.

 

[Doober]

I know this isn't really a horsepower-related thread, but for anyone looking for a shorty-style header (as I may be), it may be viable to run a set of Camaro/Firebird headers that bolt up to the OE exhaust, since the collector should end up in the same spot.
http://www.summitracing.com/parts/EDL-65732/

 

[83LSWagon]

Those do fit with or without AC. If you are running A/C thoough, and keeping the air box on the firewall, it may be better to use the vette shorties. If I remember correctly, they dont have the EGR/Air pump ports, and are more swept back. I mention this only because the maro shorties were rather close on my swap.