Hi everyone im new to this fourm and to building up the 5.3 I have a 03 Z71 tahoe that I would like to get a little more out of anyone know on average what a magnaflow CB system and a air intake would do for it and will it set any codes. I also have a 99 ws6 T/A does the 5.3 react similar to mods as the 5.7 does
Thanks

 

I have both and no codes,exhaust is a little quiet for my taste but nice.