2003 5.3L free mods?

[sting5841]

Hi I'm looking for free mods for my 03 5.3L I heard of

some but I'm looking for more specific

please help

[gmc4x4]

Mines not a vortec but I hear a lot about them over at fullsizechevy.com.......if you dont have any luck here try there they will hook ya up...

[JLFitzpatrick]

Try this:

 

http://www.ls1.com/index_ls1_mods.html

 

Engine shown is F-Body, but mods are similar.

 

EGR Mod & TB Bypass are the freebies.

[sting5841]

Thanks guys I'll try them and let you know

[wonderl33t]

Tow/Haul. hahaah