Originally Posted by Kinfolk_Warren
I currently have Kooks Longtube headers, Kooks Offroad X-pipe and Stock GXP Mufflers. My wife and I cannot stand the smell while idling. Can I weld in high flow cats to the Offroad X-Pipe?
Yes, just have a decent exhaust shop add high flow cats just after the flanges and before the rear O2 sensors. Look at the Kooks catted x-pipe as an example. Or you can just buy the kooks catted connections pipes which will likely not cost too much more and keep it a bolt on affair.
You may need to have the car re-tuned that as adding/removing cats can mess with some drive-ability things. Depends on the current tune and how "high flow" the cats are.
2009 PBM GT
Under the Knife Again
Wiseco Pistons, K1 Rods, Johnson Lifters, BLP Keep Hatin' PDS Cam, Roto-Fab, BLP Ported Intake and Throttle Body, Kooks 1-7/8 long tubes, XForce Varex Catback, ZL1 Converter, Camaro Trans Pan/Filter, GXP Brembos
Breyton GTS-AV Wheels, 6k HIDs, Holden Steering Wheel and Paddle Shifters, Eibach Springs, 35% Tint
Tuned by Day Tuning
Last edited by ebg8gt; 06-10-2019 at 11:29 AM.