last year i gutted my cats on my slp catted x pipe cause i didnt want to buy a o/r x. i know it was a stupid idea but should i get it retuned? im running a 100 shot and have a tune for it. will it throw the tune off at all?

 

I don't think that you would have to, but a fresh tune with every little mod helps.

I though that SLP midpipes were modular, and they came with 2 pieces of pipe (race pipes) that would bolt in whenever you didn't want the cats?