Aftermarket Chips ???

[Sparkplug70]

Does anyone know of a aftermarket performance chip for the 2004 LS V8 that creates real HP gains and not just a electronic shift kit ? Thanks and Happy Saturday to Everyone

 

[Rancor Keeper]

SCT X4, tunes by Torrie:

http://www.unleashedtuning.com/sct-x4-power-flash-programmer/

 

[odinsLSon]

Has anyone tried the Thornton obd tuner?