My Avalanche just hit 36k (warrantee expiration) and within 100 miles, the exhaust has been modified. The behemoth OEM muffler, now resides in my shed. In it's place, is a Summit 3in x 24in glass pack. Using BPs S10 as an example, (modded exhaust with NO muffler) I thought I could almost do the same. So, off I went to Mentor Discount Muffler. Off with the old, and in with the new. Well, the desired affect has been over done. She's loud. Nice idle, but any acceleration is, well almost obnoxious. It's louder than my Nova. But, I'll admit, at WFO @ 4800 rpm, she's sweet.

Will it last? Probably not.
I'm currently congering up 'exhaust rev b'.