I do like Magnaflow but they can be pretty loud. My dual 3" into a single 3.5" is LOUD. It even has dual 3" cats on it (hi flow) and still went 138mph in the 1/4 all motor.

Dynomax makes an UltraFlo which is one of the quieter mufflers I have run.
http://www.dynomax.com/mufflers/ultr...elded-mufflers

Here was my Laguna Seca 92db exhaust.... single 3.5" into dual 3" UltraFlo mufflers. It was stupid quiet and still ran 1:33 there not fully pushing it. 2470lbs wet.... 12:1 compression 438ci with stock LS3 heads/intake, GSR dog box, 18x12's all corners only 530rwhp/510rwtq but torque everywhere.

I am running the Black Widow Pro Venoms, and really like them. I'm one of the few running a big block in my car (Shafiroff 540 Ultra Street) and recently converted the car over to a complete DSE set-up and had the opportunity to have the exhaust redone.....I did however, keep my Black Widows and incorporated them into the new exhaust system.

Old set-up....

http://i190.photobucket.com/albums/z...psvlkvdm3s.png

New set-up with DSE Q-link and 3-inch exhaust...

http://i190.photobucket.com/albums/z...psdwcmcsfp.jpg

http://i190.photobucket.com/albums/z...psi7dhusxv.jpg

I have Spintech with an LS3 and if the revs climb fast, the drone is unbearable. They were great with the 400 Pontiac. Also looking for something quieter and drone free.

Black Widows
 

Cant wait to hear my Black Wodows 3" !!!
Will compare them against the Borla XS Pro that are in there now

Cheers
Steve

I was limited to picking a smaller sized muffler for my limited clearance. I also didn't want the traditional raspy tinny crackly sound of most aftermarket LS3 exhaust.... I went with QuickTime Performance AR3 mufflers. The deep tone they produce is very amazing. They are louder than I would have thought but I also should realize anything with long tube headers, no cats, and 3" exhaust will just be noisy and there's not much around that.

double tap