[kickerofdoom]

If I do a 9 psi would I need to upgrade the engine,rear end or the auto transmission. I have basic bolt on and keep the motor in good shape

 

[Skargon]

You would wanna have a Posi rear atleast, I would do supporting upgrades just to be safe, THEN buy the Procharger and PSI to 15 or something.

 

[Project Pony]

+1 on the tlok.

 

[davidcseifert]

9psi is nothing to fret about