Quote:
Originally Posted by M3DCTBT
I hold one of the higher whp charts at 407.7whp along with jonmartin at 407whp and we used modified stock x pipes. My car even hadPeople can preach all they want about x designs and pipe diameter but ive yet to see it translate on the dyno sheet.
Ive since put on a full gintani true dual x pipe but that is for the great exotic sound more then the performance.
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Thanks for chiming in. What were your mods when you put down 407? Were your secondary cats removed as well? Did you gain anything with the gintani?