Quote:
Originally Posted by FR-Sizzle
Your wrong. Look at Perrins Blog with a header back system, tune and intake they got 31 whp. I would probably get a Header/front/over pipe/axle back or just a header back system as I dont like how loud n raspy headers make an exhaust.
I would like to see a 2.5 inch perrin exhaust w/ front/over pipe and a catted header to see how that sounds. The 3 inch system seems like it would be really loud with headers.
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Did they try with header only, intake and tune?
Otherwise, putting the gain down to the header back is misguided.
You can see how little most header backs do for an NA build, by how little the gains are.
Sure, there's always good gains when there is a custom tune applied, the same applies to an full stock exhaust with a tune.