This pulley is the one to use if you're looking for every bit of horsepower you can get without sacrificing too much cooling capability.  For "hot street" engines, you're generally going to run them at higher RPM than normal. While a slightly smaller pulley is going to turn the belt a little slower, you're likely going to be revving a little higher, so the cooling fan is going to deliver plenty of cooling air to the heads, given the powerband you'll be spending the most time in.  The 6" diameter pulley is smaller than stock (6-3/4"), yet not as drastic of a change in cooling fan RPM as the traditional "power pulley", which measures 5-1/4".  It's also excellent for high revving engines to help prevent the cooling fan from breaking apart due to excessive RPM's revving too quickly. The deep CNC-machine etched numbers are both handsome and easy to read. Note that the smaller diameter pulley requires a slightly smaller belt.

This is one of the best quality crankshaft pulleys money can buy for the street/strip enthusiast.

It also features a hardened steel inner hub with deep spirals to re-direct oil back into your engine case and prevent oil leaks, but can be ordered in a "sand-sealed" version.

Made in USA.