I may have to remove my X-pipe to make room for the cut-outs. Does the X-pipe really give you any performance? If it does how much?

 

My intial setup replaced the x-pipe with the cutouts. No real HP gain, just volume.

Put them at the end of the header, have new pipes bent and weld in the cats. Reuse x-pipe in same location.

One trick:

Assuming you purchased pre-fab cutouts, trim back the outlet (NOT the dumpout) to the dumpout and re-weld a flange. you'll gain 2 inches. this will help you make the 90 bend on the drivers side but you'll have to have your mid-pipe cut and a new flange welded on.

so it goes: header, cutout, re-welded mid-pipe, O2 simulators, x-pipe, mufflers.

To gain power, that's the setup...




-Andy