Today, I had what is hopefully my final exhaust revision put on the Alero.
For those of you who don't know, the front half consists of TOG headers dumping into a 2.5" Magnaflow catalytic converter (gotta stay legal).
Anyhow, about 2 weeks ago I removed my 2.25" Borla cat-back and had a 2.5" SLP cat-back bolted in, along with a Magnaflow 2.5" round resonator.
The exhaust was
super-deep, with none of the raspiness that characterizes a SLP exhaust, but still too loud (although it sounded excellent at idle). The cabin drone between 1500-2200rpm was unbearable.
Fast-forward to this morning. I had the SLP muffler removed, and replaced it with a #14210 Magnaflow muffler (2.5" inlet and outlet on the same end of the muffler). Voila, nice and quiet, with no flow restriction. And it looks totally stock from behind.
I wish I could post a video, but I don't have a way to record it. Think Borla with an edge, and you've about got it.
Oh, and the PowrTuner experiment starts this Tuesday.