was wondering what size piping is on the us spec itr. tried searching but i suck at it also googled but cant find nothing. thank u

 

The USDM stock exhaust diameter is 2.25" for the most part, but it does bottle up in a few places to 2" or smaller if I'm not mistaken.

Not the best performance exhaust out there, but very good for a stock system, still flows quite nice and is very quiet while still obtaining a nice deep tone.

My original OEM exhaust failed on me this year on my 97 ITR, so I replaced it with another stock setup from the dealer

 

hmm sounds good. i plan on buying my friends for my gsr which he is selling to me for 150 bucks with a high flo cat. thank you for the info

 

Since we're on the subject of oem exhaust, if i plan to run a test pipe with an aftermarket midpipe and the oem axle back, will there be anything negative bout that setup? Just tryin to get better flow, but keepin the noise to factory levels and the look of oem as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm_DC2R &raquo;</TD></TR><TR><TD CLASS="quote">Since we're on the subject of oem exhaust, if i plan to run a test pipe with an aftermarket midpipe and the oem axle back, will there be anything negative bout that setup? Just tryin to get better flow, but keepin the noise to factory levels and the look of oem as well.</TD></TR></TABLE>

thats the same thing that iam looking to do

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dc2 Joe &raquo;</TD></TR><TR><TD CLASS="quote">hmm sounds good. i plan on buying my friends for my gsr which he is selling to me for 150 bucks with a high flo cat. thank you for the info </TD></TR></TABLE>

Just note that if your GS-R isn't a '00-'01, the length of the setup will be too short for your car (assuming it was previously installed on an ITR).