Quote:
Originally Posted by semtex
Well, I think the real question is what happens when tuning enters the equation. Would I make more power with the stock headers and a tune? Or with the Stillen headers and a tune? Tuning could change everything. There could be gains to be had from tuning with the Stillen headers installed that would not be available otherwise (i.e., with the stock headers).
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You'll see gains, but then again you'll see gains with a tune without the headers.
I really don't see the point of doing headers on the HR or VHR. They are already equal length from the factory; and the fact is that the engine is not going to benefit from larger diameter manifold piping; not NA at least.