Ti3d in

I was planning to run a JDM ITR header to a carsound cat to a RSR Exmag cat-back. Now I know that the header's collector is 2.5 inch, and it would taper down to the cat-back's 2.36 inch piping. Would that be a noticeable restriction? Would it be worth it to get a 2.5 inch cat-back?

xx dc2teg xx

is it considered bottleneck/step down?...YES

if you change to a 2.5" exhaust will you dramatically gain hp?...NO

Nexx

You also forgot about the catalytic convertor. =[

EDIT: Unless it's also 2.5".


Modified by Nexx at 6:05 AM 2/9/2004

Ti3d in

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nexx &raquo;</TD></TR><TR><TD CLASS="quote">You also forgot about the catalytic convertor. =[ </TD></TR></TABLE>

The cat is a Carsound 2.5 inch. Or I might just run a testpipe.

allm0torGSR

A 2.5 inch exhaust would only benefit you if you upgrade your internals. If you are only doing I/H/C/E, it's no biggie.