Hi,
Have flowmasters. Yes, they are a little louder, but they also breath. What guys need to understand is, sure put that K&N airfilter on, but having smallish/limited mufflers is like trying to run with one finger up your nose. Not only does it look dorky, it also means your lungs (your engine) cannot breath as well. Simply put, your engine is a giant airpump....
93 Ext Cab w/ 99' LS1, AFR 205cc heads milled to 59cc, G5X2 cam (232/240 .595/.608@114LSA), Edel LS1 headers, 6.0L intake
Edel IAS shocks, Hotchkis front/rear antisway bars, 3.73 Axle w/ 8.5" -10-bolt w/ Eaton Posi