I have an 04 Silvy w/Forged 370 LQ4 with a Whipple 2.3L. I bought the charger used and then I found out that Whipple no longer makes pulleys for my compressor (Lysholm w/dipstick) and i'm stuck with 6psi. So i'm looking for an overdrive crank pulley to squeeze more boost.
My question is:

Who makes a 6 rib underdrive pulley for my engine?!!! I can't seem to find any, they're all 8 rib.

I m deployed right now in Iraq and can't see my truck to confirm it's a 6 rib, but if I remember correctly it is.... any advice or part numbers would be awesome! Thanks guys!

 

Innovators West and ATI make them, 10% over. FYI, a 2010+ Camaro uses the same pulley as a truck.

 

another member send that to me lol

 

Im using an 8rib Innovators West OD pulley and im still 6rib on other pullies.

Works great, no probs, I would get the 8 rib pulley as its the same price as the 6, then you can upgrade later to all 8 rib if ya want.