Exhaust question
 

Just bought a 2007 silverado 1500 classic, 5.3 liter. Already bought a K&N air filter today. Looking for some ideas on an exhaust system for it?
-thanks

I got the same truck, have a muffler shop special 1 into 2 cat back with a flowmaster series 40. sounds pretty good to me. For less than 400 bucks

I ended up buying a magnaflow catback dual 3 1/2 inch outs. also bought a K&N cold air intake

Run a cooler t-stat to get a little more power. I run a 160 in mine. But you may need tuning in yours to turn on the electric fans on at a lower temp.