Muffler replacement huge horsepower gains!

[mickmate]

Good news to report, two of the three recently installed sets of Classic Chambered have been fired up. Funnily enough it was literally within minutes of each other. They sound pretty good even running indoors with both sets. I got the opportunity to log on a few miles with a set of the 2.5" using the transisition cones both on entry and exit to the mufflers. I ran my kids around in the car and found them quite easy to hear and talk to while driving. I received several comments about how loud they were from outside the car, some were car guys that said awesome, others were whiny neighbours that question the legality of such noisy exhausts so take that for what it's worth. No need for earplugs and plenty of power though I can't comment on the before and after difference in power from them. The customer will probably weigh in on it.

[DocDirk]

I had my 533 BB Ford chassis dyno'd before and after changing from stock 1 7/8" ID baffles to 2 1/2" ID baffles and the result was a gain of almost 50 peak RWHP, and increased low end torque. I'll post the dyno graphs when I have them...should be today or tomorrow.

Regards!

Dirk