Should I or should I not..

[SOUN1]

I have an 05 ZX6R (preping 4 track/street) I'm mocking up a twin exhaust under the tail light..My ? is , should I gut out the cat? Up side of gutting / down side of gutting? I don't have a PC nor care to get 1...

[whispering smith]

I have the 04 zx6r 636 I put the pc custom map with slip on dynode at 109 with slip on arkrapovic. Why the x strem pipe change. Post some pics.

[SOUN1]

I like a dual look (different), I seen 1 and love the look but toooo pricey for a poor guy like me :spit: I'll post some photos when I'm done..maybe in 2 weeks...