178mm Crank and 69mm SC. I say which ever pulley you can find at a better price is teh one to get. They are basically the same. We sell both ASP and Eurocharged pulleys and have had an equal number of good and bad from both crowds. The Eurocharged is lighter and an all new design, but the install is more of a PITA. The ASP is built off a stock unit and allows you to keep that "stealth" look to the car.

As for the SC pulley, I prefer machining down the stock pulley for its cost (although the C3 pulley has come down a lot) and OEM reliability. Our machine shop does our SC pulleys for 375.00 and a new C3 pulley I believe is down to 450.00 when they were near 700.00.

The easiest to bolt on and go without needing tons of supporting mods are the 178mm or the smaller SC puley. It all depends on how deep you want to go with this.