Scott, the final decision is up to you. I have heard a set of Borla's on a '06 'Vette with an LS2 and they made a very nice low rumble at idle. Start up was a sharp sound as well though. Rev's were smooth and strong. When the guy left the shop he got on the freeway we were next to. The ramp is visible from the shop, and he floored it getting on the freeway. It sounded very refined and strong. More like a Ferrari than a 'Vette. I loved that sound and would love to replicate it somehow. On our cars it would sound different based on the location of the exhaust exit. Possibly quieter with full tail pipes.

I always use Borla XR-1 on our projects... but then again most of them have been old skool big blocks and I run a min of 3-3.5" tubes. Anything with decent compression or cubes would benifit from the XR-1's. I run them on our 9 second camaro thats powered by a 427 sbc and it actually runs quicker with the mufflers than without them.
The mustang project is getting a set of flowmasters only because I love the sound of them on a 5.0. All the young punks have them on their mustangs and it sounds great.
But I'd really like to know what an XR-1 would sound like an an LS-x.

2 Mailboxes with wadded up Toilet paper (That's Facial Tissue to the Ladies). Want it loud, open the mail door. Quiet? Turn the Key to the "OFF" position.

I like em loud.

Here is a sound clip of my LS2 with Hooker long tubes, back, x pipe, and 3" stainless all the way back with Dynomax Ultra Flows.

Quiet and almost subdued at idle, but get your attention when you get on it. There is a Speed World Challenge C5 Corvette that races with our club, this exhaust system sounds a lot like it.

Jeff

Sorry I couldn't post it here because of invalid file type, but if you don't mind going here you can hear it. http://www.pro-touring.com/forum/showthread.php?t=23760

We use spintech pro street mufflers on everything. amrys 57 with the ls6 has them on it.........it SOUNDS..very nice.:yes:

I like the Flowmaster sound myself on a 69 Camaro. After all it is a 69 Camaro.

I'll bet Big Jim likes the 40 series flowmasters!

Oh yes...smokey burnouts and flowmasters. Its like

PB&J
Steve and Edie
Hot rods and manual shifts

Scott you will like the spintech sound. -Rob

Scott. I found the right one for you. :thumbsup:

http://www.craigfr.com/rice/howto/muffler.JPG

Lol!!