I'm posting this for a friend of mine that just got an extended cab 2003 5.3L extended cab chevy. I don't know alot about the truck line since I own a Z28, he is a converted ricer(drove a pewter camry) He wanted an f-body but family didn't allow it. And now his truck is a pet project because I want a RCSB 5.3L. My question is what should he do to the truck first?Keep in mind it is still in warranty and has 29,000 miles. Any info would help, thanks He loves the motor and he wants a little more power to shut some hemi's down.

 

Intake, exhaust, tune. That should give him a good start.

 

man this might not get a lot of answers. but a good place to see what others are running and what mods they have. exhaust-intake- and bolt on's are the place to start. good luck. just make sure to do searches before adding mod's. stick with sponsors>>>>>>>>>>>>

 

modded stock intake, Custom tune (one with free updates) or you could do the predator with a custom tune then you could change it back for warranty work (I think thats how it works), catback-alot like magnaflow and corsa, i'm happy with my flowmaster but some people don't like em, he could put on electric fans-ls1 fans or flexalites, ASP underdrive pulley. All of that would be great for starters and make a good difference over stock

 

He can already shut any stock Hemi down including Reg cabs! He should be able to beat a reg cab. I can with same power as 5.3