If you want it to sound similar to that yellow thing, you need to run tailpipes and stainless tubing. Stainless has a thicker sound, but can be a pain in the butt and wallet to set up. the muffler I'd choose to get that sound would be a Borla, but not XR-1s. Borla makes a round, short muffler in 2.5 inch only called an S type. I've ran them on all kinds of stuff and they sound very similar to that pitch on that ls3. Super raspy and ultra nasty at WOT. Be warned though- folks in the next county will hear it when you let it eat. They don't drone at all with tailpipes.

An alternative and my personal favorite is a Dynomax bullet in 2.5 inch with full tailpipes and an x pipe. It's such a deep, scary sound that isn't like anything else on the market. They didn't drone at all, but snapped a lot of necks while cruising a show. Here's just a little LS1 with a TREX and that exact setup:

https://www.youtube.com/watch?v=w0dL_VBNqEI

I have the stainless piping already. Just need the mufflers now so the shop can bend and weld it all up. I need whatever mufflers I chose to be in stainless also.

Since you're so undecided, and who wouldn't be, maybe you could have them use clamps on the mufflers instead of welding them. That way if you don't like them or want to try another pair after this initial pair it will be easy to swap out. Just a thought.

This video has me sold...... Time to order some

https://www.youtube.com/watch?v=IGTsqpk0rEk

Yep, that does sound pretty sick. A little loud for my neighborhood, but sure sounds good. Great choice John. :thumbsup:

Which SPintechs are people buying? The Sportsman or Super pro street?

People buy both I'm sure.

I've had both the Sportsman XL and the Super Pro Street. I prefer the Super Pro Street. The Sportsman XL was a little quiet for me.

Your results may vary.

This sounds as badass as they come (and go)

DAVE...What exhaust does it have??

^^ Magnaflow 3". Not too bad, but they ain't Spintechs. :D

I have the Sportsman XL and love them.