I would say flowmaster american thunder. I don't know about the others, but flowmaster is loud. When my dad starts his truck up in the driveway, my window vibrates One thing is I did not notice much difference in power, but maybe it's just me.

 

OT, but what sized cam are you running in that 427, Gear? It sounds great.

 

Thanks Marc.....

It a Custom Grind Cam, LS1 232/242 XER lobes 110ICL 112LSA

 

The Magnaflow Is The Only Way To Go

 

you gotta go with the Corsa exhaust. I bought it about a year ago and the sound is incredible. It flows great and sounds like you have a tuned engine even when your truck is stock. The thing i like about it is its not annoying going down the road, its super quiet unless you gun it.

CHEVYNOLE, are u a FSU fan????