[Brent]

i may sound like a dumb, but what is a t-lok??? and would gears mess with warranty? thx again

Chip will not help you much with your current set up

T-Lok = Traction Lok

Gears will unlikely cause any problems with your warranty.....

I would recommend 4.10 gears for Auto and 3.73 for Manual

You will however need to get a chip if you change gears to correct your speedo and remove your speed limiter

 

[Brent]

if power is what you're looking for you're best bet is an UD pulley. It takes very little knowledge mechnical knowledge to do this mod. Anyways, I would get this and a CAI, it will add some bling bling under your hood and you'll pick up some power. You will have somewhere around 205hp with these added.

He will notice 4.10's more than he will notice a Underdrive pulley imo

 

[Brent]

instead of getting a chip for your speedometer he can get a speed cal right?

Yes but if he changes gears he is going to need a chip anyways so you might as well use that to correct both