which X PIPE
 

How do the catted mustang tuning X pipes for the 99-04 GT's compare to the SLP catted X pipe? will I need mil's for either or can I do that with my SCT XCAL 2?

You only need MIL's for o/r really.......If you have a X-cal 2 you just need to turn turn thos O2 sensor off. Cant beat the stainless steel on the SLP and the interchangeable race pipes. But the MT catted x-pipe is cheaper, it is also aluminum. So SLP is better quality and functionality. But if your going down a cheaper road then MT catted x-pipe is the way to go.

The MT Xpipe is steel with a aluminum coating. It will corrode much quicker and usually at the welds.

I think I'll probably be willing to spend another 100.00 for a better quality and longer lasting X pipe.