I recently had OBX 1 7/8 OBX headers with catless X installed. Along with Vararam and a good dyno tune the car made great numbers, performs well and sounds really good. However, IT STINKS AS SOOOO BAAAAAD!!! LOL. I expected some smell at times because I have had catless set up on some of my previous cars but this is something wicked.
SO, I have been searching and searching but still not sure where I can get just cats that will fit and perform great? Any advice will be appreciated.

 

Walk in the park,

Get who every you bought the header with X pipe from, and tell they you need cats to use instead of the Resonators on your OBX system (X pipe).

The Resonators is just piece of pipe as a cat delete (same length as a cat would be) right after the header collectors at the start of the X pipe.

With cats,


Without cats,


Best guess, going to run you around $100 a cat since they will have the collector piece on them so you can just replace the resonators.cat delete on the X pipe now.


If you want to go cheaper on the cats, than if you have a 2 1/2" X pipe, just need 2-2 1/2" high flow cats that are $50 each, then shorten the resonator pipe so you can weld in the cats in instead.
This tends to work out better, since you first hand fit the cats in place, spot weld them, then pull the X pipe to weld it as a sold piece instead of having the band connector right after the cats/resonators, then again back after the O2 pipes. This leaves the X pipe to bolt onto the collectors at the headers, then the band clamps to the axle back only; with no areas in between to leak instead.


http://www.ebay.com/itm/410250-2-5-Universal-High-Flow-Performance-Stainless-Catalytic-Converter/121410508261?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D28797%26meid%3D25a4849ce5c3420cb4e345c3c93dfc70%26pid%3D100033%26rk%3D1%26rkt%3D3%26mehot%3Dpp%26sd%3D121410508261