add a good cat back and call it good. 3in cat back is good for anything you will be doing. anything bigger can cause no gain or loss of power. slp, corsa, magnaflow, flowmaster. any will work fine, pick one or look at other 3 in. the heads are the bottleneck in the lt1. intake and exhaust will add good amount but to get the real gains you gotta dig into the motor and p&p heads and intake and add performance cam.

 

Which cat back would be better, the flowmaster american thunder or the hooker cat back. I like the sound and look of the flowmaster a lot more but i've heard that they don't flow very good

 

Well I finally decided to just go with summit headers and turn down purple hornies. Let me know what you guys think. I hope it's not too loud haha

 

I have these. They work great, and you can't beat the price. Noise Canceling Electronic Ear Muffs