Originally Posted by JohnnyBfromPeoria
Are the pipes a larger diameter? If so, that's why the torque is lower (my guess), as some of the scavenging efficiency would be lost. Also, if that's the case, I suppose you could repipe with 2.25" between the cats and the mufflers. Probably not worth it, though.
Yes the pipes are considerably larger. If they weren't then what would be the point in the upgrade, right? The loss in torque is not an issue and I had no complaint or inquiry as to its absense because the upper rpm gains make up for it. What I want to know is which aftermarket axle back bolt on exhausts would sound the best, i.e. throaty deep tone vs. the obnoxious "bubble" sound my girlfriend refers to it by.