i got a 2003 chevy with a stock 5.3 in it and i wanna know what would be the best cam, headers, stall, and so on... im new to this and any information yall could give me would be a big help.. what im lookin for is to make my truck low 13s and possable high 12s,, with out geting a new motor..

 

I ran a 13.9 with the following mods>

ASP under drive pullys
K&N fipk
E-fans
maga-core wires
magaflow muffler with a turn down
TCI sf 3000
trans-go shift kit
HP tuners
3.73 w/ a arburn locker
And M/T 255-50/r16 ET street radials for the track..

 

Is your truck an RCSB or EC? IMO, you'll need to start with things like headers, exhaust cold air intake a higher stall converter and some tuning. That's what I would consider the foundational work before doing internal mods like heads and cam.

Richard

 

its a ext cab, step side... with a hypertech