Hey everyone i just bought a 2005 5.3 Z71, i am ready to do a few mods. i am planning on getting a ported TB, CAI, and i am unsure of the exhaust. i am worried about going to far and getting LT's so i am thinking about doing a cutout or a catback which will get me the best results. oh and it will be getting a dyno tune by the guys who work on my vette.

 

Great place to start.....

https://www.performancetrucks.net/fo...d.php?t=414374

 

the 5.3 in the 2005 Z71 is an aluminum block L33. A super platform to modify with great response. Click my sig if you want to see what I have done

The link in the post above is a good start.