Quote:
Originally Posted by Papethova
I definitely gained power by deleting the 2ary cats and the resonator from the mid pipe. Disclaimer... it was on the 135, the M mods are still pending
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yea, you might have gained some power but i did it the wrong way.. wen i first did the dps with cat deletes and the rest stock it was perfect.. i got bored and took the mid pipe cats out and it was too much flow for the stock muffler which robbed me of power on higher boost levels.. now i fixed the solution= straight pipes with a resi.. sounds ridiculously loud when cold but its not so bad once its warm.. and the gains are crazy..