I have an 06 GMC 5.3 with 130,000 miles, i have a Bully Dog GT Tuner and nothing else done besides leveling kit and 33 inch tires. I want to do some more performance things. I was thinking a CAI and Long Tube Headers? What do you guys think?

 

its a good start

 

Specter CAI,
Speed engineering headers,
MBRP catback,
Vette servo,
Trans cooler,
Get a real tune..

You will be impressed.

 

This except I like magnaflow exhaust and eBay CAI