dsylvain9

Hello everyone. New to this site and would like some opinion on a catted x pipe. I have a 2008 roush blackjack. The previous owner installed roush axle back offroad mufflers. And also installed a offroad x pipe. Not sure what kind the x pipe is. However the car is extremely loud. I need to quiet it down. Thoughts on a different CATTED x pipe? And will this quiet the car? I appreciate the help.

07 Boss

I'm assuming that since it's a limited edition roush that it is supercharged. Cat failures and supercharges tend to be catastrophic, so I wouldn't put cats on there unless I had to for smog purposes. But to answer your question, cats will quiet it down. BUT so will different mufflers or resonators. My exhaust was a little loud and unrefined so I welded in some old school cherry bomb resonators just before the axle and it sounds much better now. I would look at other options before putting cats in.

dsylvain9

Ok great. I wont jump the gun yet ill keep looking. Meeting with a local tuning shop this week to look at the car. I appreciate the response boss07.

Glenn

I agree swap out the mufflers.

laserred38

You'll be fine with a catted X-pipe. Stay with a high quality brand like Bassani, Borla, etc.

ford20

Mmmmmm supercharged cars and cat failure rates are prevalent and as 07boss said, the results are often catastrophic. I would just run a different muffler to quiet it down. The heat associated with the supercharger is just higher than what the cats were designed for.

laserred38

High flow cats aren't the same as OEM cats. Come on there's thousands of supercharged cars running cats. It's partially the heat, but partially a tune that's too rich. The supercharger didn't cause the failure...but the failure happened on a supercharged car. I know guys with Boss/CJ intakes that killed their cats too. Hell I even had a SLP cat go bad on my 03 GT. It was a combination of old age and tune running rich. That car was a pretty much stock 2v 4.6...