What brand are you guys using??
Thanks

 

Asp udp

 

asp ud it works great alot of guys will say it doesn't help much. But i noticed a difference in the rpm range and my top end

 

Thanks guys. Now I start looking for place that sells them.

 

im running a ASP ud crank pulley only. i cant say i seen a difference bc i added a 90mm tb, and CAI

 

ASP, call Summit.

 

summit brand. it is actually a trick flow. What belts are you guys using? I have a gates and it squeaks when my truck shifts.

 

i use w.e Thunder Racing gave me lol

 

I saw these Trick Flow udp just the other day. That said, do they or anybody make a non-underdrive version that's SFI rated?

 

ATI is what your gonna want to look for, pretty sure they make a oem size. they are expensive but are the best of the best when it comes to pulleys..

might even make a slight overdrive size, that might help some with that huffer of yours in the psi dept..