Blower Pulley - 8mm HTD 45 Teeth x 3.500in

The Blower Drive Service Blower Pulley – 8mm HTD 45 Teeth x 3.500in (Part No. BP-6845) is a precision supercharger pulley engineered for high-performance forced-induction applications. This 45-tooth HTD pulley features 8mm pitch belt compatibility and a 3.5-inch width, delivering the exacting tolerances required for reliable boost delivery and consistent supercharger operation under demanding conditions.

Constructed from aluminum with a polished finish, this pulley combines weight efficiency with corrosion resistance—critical factors in high-heat engine bay environments. The HTD (Synchronous) profile ensures positive belt engagement without slippage, maintaining precise boost curve characteristics across varying RPM ranges. Weighing 1.62 lbs, the compact design (4.6" × 3.85" × 4.75") integrates seamlessly into tight supercharger installations while maintaining thermal stability during sustained operation.

This is the specification choice for builders and tuners running Blower Drive Service supercharger kits who require OEM-matched or performance-upgrade pulley configurations. The 45-tooth count is a standard ratio for naturally aspirated to moderate boost conversions; selecting the correct tooth count is essential for achieving target boost levels without over-spinning the supercharger. Each pulley ships individually and is compatible with standard HTD belt applications used in modern forced-induction systems.

Blower Drive Service is recognized in the performance engine community for precision manufacturing and interchangeability with both OEM supercharger systems and aftermarket builds. Proper pulley selection directly impacts supercharger efficiency, belt life, and overall drivetrain reliability. Verify fitment against your specific supercharger model and belt type before installation.