So I told my friend to go with magnaflow catted x + SLP LM2 or stingers since I have heard some clips and the combo sounds awesome. Today I talked to him and he said "oh I went with off road magnaflow x pipe + slp lm2 I was like why u like RASP ... he's like well the guy said catted will hurt performance a lot and no cats will help the whipple a lot. BS OR?