Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Borla exhaust

The stock SVT exhaust has 3 weak points.

2" resonator on 2.25" pipe (2 HP)
Rear Y split is crush fit (like the Y-pipe) (few HP!)
Rear mufflers are simple baffled design (2 HP)

So theoretically fix those weakness and you should make what the aftermarkets do...