I have a question: I contacted ASP (from a previous post here) and got some information about a pulley upgrade for my C32. When I asked how much hp improvement I could expect if I bought it, I was told "28 hp to the wheels". Is this believable? The upgrade would replace the crank pulley and water pump pulley. I'm a little skeptical about the 28 hp claim though. Any comments?

 

It will drive the S/C quicker and give you more boost but I don't know what the gains are, not too many pullied C32s around. Just in comparison from their websites, Renntech claims 20HP from their pulley kit and Evosport claims 50-60 HP (with chip and intercooler mods, no seperate quote just for the pulleys).