i have a 99 2 door integra GSR currently with greddy evo catback..i plan on getting the JDM ITR header along with a carsound cat for this setup..im going to be ordering from kteller.com but i need to state what length i need the cat in which he doesnt know..anyone on here know length id need? oh and the catback is made for my car if that helps..

 

when i ordered my sound car cat they sent me a universal cat so it had to be welded so i sent it back. theres a site that sells them already with flanges and if you need a bung on the cat they can do it too. the site is... http://www.kteller.com/store/index.php/cPath/23_25

 

yea i plan on ordering off of there but i need to state the length i need..he doesnt know./.

 

I should be able to help you out.. We also get exhaust parts from Kteller.

You are looking to mate the JDM ITR (OEM in Japan) to the greddy exhaust? Drop me a PM so I can get some more info from you.

Basically we just need to figure out the difference in length btwn the JDM ITR header and the USDM GSR header. The greddy exhaust should start @ the same position as the OE exhaust.

Also what year is your GSR? I believe the different years have different cat lengths.

Here is the only useful info I have found so far..

HERE

sounds like the cat you would need could be anywhere from 17"-16.5" This range could be from error in measurments and/or the fact that that .5" doesn't make much of a difference.

 

i'm not absolutely sure, but the 16 5/8" cat will probably work.

 

one thing to note. If you are getting the carsound cat for a GSR, it only fits the California-spec exhausts. Call car-sound, they willl tell you the same. BTW if you go to www.car-sound.com it has the specs for their direct fit cats, as long as you know the part#