We finally got the car back from the exhaust shop yesterday afternoon. We didn’t have time to do much with it because it was close to quitin’ time so we left it till this morning to strap it down to the dyno and see what this engine can do once it can breathe.

As you can see from the photos of the exhaust, it can be tricky to route the piping properly under the car. At a glance everything looks symmetrical, but that is far from the case. The differential is off center and the spare wheel recess in the trunk is also a bit different from one side to the next. Either way, Hector at Exhaust Depot took care of the Challenger and everything fits together perfectly. We decided to go 3″ from the header manifold all the way back. This includes a pair of Catco 3″ hi-flow catalytic converters and a Magnaflow muffler which has the X-pipe inside of it. Stock tips were reused, and the pipes where painted black with high heat paint so that people wouldn’t think anything out of the ordinary at first glance. Sleeper style…(if an SRT8 could ever be considered a sleeper)

If you look at max power and torque gains it really isn’t that impressive. But the gains across the rev range were impressive. At 4200 RPM gains were 15hp and 20 ft-lbs, not to shabby, and right in the area where it’s usable.