Info required on Exhaust manifold

[freebird]

Hi All

I have a standard S15 SpecR apart from air filter and 3" exhaust from the turbo back. I have blown the turbo to manifold gasket and have the whole lot off to replace it. So here's my question, how much benefit will I see from an aftermarket manifold and how much are they just for show, I'm an engineer and know all the theory’s, I was just wandering what peoples experiences were in the real world?

 

[DeanS15]

the general feeling that i got is that until you are pushing past the 300bhp barrier you wont really see any real benefit from it, after that it is needed to go any further

 

[freebird]

Cheers that what I was thinking :nod: :thumbs: