Don Shaffer

Hello Mighty Mustang people
I have a 98 GT and would like a little more HP. Has any one removed the
cadlilic converters and if so how did it turn out for them?

0949er

you wont gain much HP but it will be considerably louder. It will make your car stink though.

Are you talking about hollowing your cats out or replacing your mid-pipe with one that has no cats?

Don Shaffer

Yes I mean to replace the mid pipe.

0949er

you might pick up a few rwhp's, but nothing major. It will mainly just make the car louder.... and like I said... make it stink lol.

Rockwell28

my car felt sluggish off the line without cats but it was alot louder I noticed just how sluggish it felt once I got a set of high flow cats welded in. Just go with hi flow cats

HasABetterSN

Sluggish? I took mine off and had no problems with it feeling any slower

Rockwell28

Super! but im not the only person that has claimed that. Goes the same with a wide open exhaust done it on both of my vehicles and noticed how sluggish it was vs when I put a muffler back on. Some vehicles are sensitive to the whole backpressure thing and the stang just has to be one of those vehicles.

Moonshine

And by stink...he means...smells like raw fuel. My car stinks...

HasABetterSN

Interesting. I always heard back pressure wasnt that big of a deal on the stangs, but I'm no expert. Gotta love the catless sound though!

65mechanic

Yeah, I helped my buddy install a Pypes O/R X on his 02. The RPMs would rocket up during revs. The car felt a lot more responsive. And yes by stink his car smelled like pure burnt race fuel when I tailed him during the summer cruising days (which by the way are right around the corner! Get warmer already!!) haha.