Quote Originally Posted by Fivefingerdeathpunch View Post
LS1tech

LS4 section, tons of info there.

LS4 market is slim and stupid $$$, Headers are a grand, downpipe is 300+ and cam is 500+ is assume.

Once you add power the trans will break. Invest in a built trans if he really wants to mod.
Bone stock i'd still add a trans cooler.