I removed my cats last year, with this setup. The parts have no leaks or rust, smooth mellow 2 1/4 mandrel bends test pipes, that bolt right to the stock or a SLP manifold Ypipe. From tuned with the stock cats and piping, to no cats and this piping. Returned was a gain of 9-10whp. Car went from high 12’s. 12.8 I think one 12.7s? To 12.6s and a 12.50 @113 best, after with this only change. The same week at NYI.
This is also a great snky mod, with no header and the stock cat back it sounds/looks stock 13 sec car. A m6 car over 3k shifts with get some crackles on shifts. Idle is very slightly louder, you can’t tell unless its next to a stock exhaust car. Got down to low 12’s best mph was 114.8
Bolts to stock or ported 00-02 manifolds, if you have a 98-99 car you can just use the better 00-02, I have a great set.
cheap looking to get $60, or with a tune we can work something out.
just the test pipes, you can use you other stock parts.
edit, best idle, cruising vid I could fine.