does anyone have a high flow cat ? on cls6spd i recently changed my cat to a Napa cat my feul sux , pick up every thing am thinking high flow i have headers intake & 2"5 pipe & magnaflow exhaust.
i found 1 but theres no 02 senor inlet wht do i do?

 

the rt high flow cat doenst do anything if u have a type s. its more for the tl-p since the pipes are smaller

well, thats what the ppl on the tl side say

 

Straight pipe that bish!

 

maybe you messed up one of the oxygen sensors when you had the cat replaced.

 

i never had the high flow cat. imo waste of money for the tl-s/cl-s. straight pipe it