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If you’re after a higher pitch LP640 sound, Fabspeed or Powercraft will do the job without touching primary cats.

Powercraft replaces the primaries (and tip section).

DTP & Fabspeed are the only two short styles, which offer the shortest path for a higher pitch, lower weight and top end power. The biggest difference is Fabspeed X-pipe has its biggest gains in the 3.5-5.5k range where DTP has its biggest gains from 5k to redline.