ATI Race Crank Pulley Damper - Nissan 300zx

Race Damper:

PN 917755, the VG30 Race Damper is built around ATI's large diameter 6.325" inertia ring to control high-RPM harmonics (the larger the diameter, the better the control of harmonics at higher RPMs/HP).

8% overdriven AC and H2O/Alt pulleys
6% overdriven PS pulley
Rated at 1000 HP capability
Weighs 7.24 lbs (stock weighs 13.4 lbs)
Aluminum outer/inner shell and pulleys
Removable crankshaft hub
Laser engraved 360° timing marks
SFI 18.1 approved
Black anodized finish
Built in the USA

Goodyear belt PNs for Race Dampers (belts are not included)

AC.........................4040385
PS...........................4040365 (somewhat tight when installing, but works)
PS alternative.........4040372 (when tight, 1/4" away from the end of the adjustment slot)
H2O/Alt..................4040400