Coming in at under 11.8 oz this precision CNC machined anodized and laser etched 10% underdrive crank pulley is the best crank pulley you'll put on the engine for the best power and response at any rpm!

These kits come with pulley, new crank bolt, and choice of new belt for a car with or without air conditioning. Extra belt can be purchased as well if wanted.

This pulley is not only lighter than all others to have an edge on power and response but being 10% underdrive means it spins all accessories that much less for them to rob power from the crank meaning more to the wheels! This also means better efficiency for not only power and response but for mpg as well.

After testing in most 1.6/1.6T Gamma platforms we found no issues with the vehicles charging or cooling capabilities so far due to being underdriven. These have been tested so far from oem idle speeds up to 8k rpm on street cars to roadcourse cars no issues!