Exaust manifauld
Burning Brakes
Joined: Apr 2014
Posts: 828
Likes: 189
I don’t know all the specific differences between all C3 and C4 manifolds. However all C4 manifolds are not the same and all C3 manifolds are not the same. So to begin even contemplating how you might retrofit something, what year C3 to what year C4 are you talking about? Right side, left side?
Lots of variables to consider. Also, even if a manifold could be swapped in that it will physically bolt up to the engine, there’s questions about any accessories like air injection pipes or other brackets and if they will fit properly or not.
Lots of variables to consider. Also, even if a manifold could be swapped in that it will physically bolt up to the engine, there’s questions about any accessories like air injection pipes or other brackets and if they will fit properly or not.
Burning Brakes
Joined: Dec 2017
Posts: 1,043
Likes: 414
2023 C3 of the Year Finalist - Modified
I doubt it. The manifolds are very different in design.
C3s use ram horn style. Look at some pictures on the Internet. Very different from c4.
also, the c3 manifolds require a gasket to the manifold outlet to rest of the exhaust. the c4 manifolds do not need a gasket to the cat section.
the c3 ram horn might bolt to the block but I think you’d have to do a lot of customization. I think all the accessory brackets would be interference because the ram horn goes up at first while the c4 stock drops down from the heads.
C3s use ram horn style. Look at some pictures on the Internet. Very different from c4.
also, the c3 manifolds require a gasket to the manifold outlet to rest of the exhaust. the c4 manifolds do not need a gasket to the cat section.
the c3 ram horn might bolt to the block but I think you’d have to do a lot of customization. I think all the accessory brackets would be interference because the ram horn goes up at first while the c4 stock drops down from the heads.
