Cog Belt Pulley - 14 Tooth 3/8in Pitch 1in Bo

The Aeromotive Cog Belt Pulley — 14 Tooth 3/8in Pitch 1in Bore — is a precision HTD fuel pump pulley engineered for high-performance fuel system applications. Constructed from aluminum and finished in natural silver, this OEM-specification pulley (part number 21108) delivers reliable synchronization with HTD belt drive systems commonly found in street performance, race, and custom fuel system installations where accurate fuel delivery and consistent pump speed are critical.

The 14-tooth design with 3/8-inch pitch ensures proper mechanical advantage and belt tension maintenance when paired with compatible HTD fuel pump drives. The 1-inch bore diameter accommodates standard fuel pump shafts, providing a direct mechanical interface without slip or run-out issues. Aluminum construction keeps weight minimal while delivering the strength required for continuous pump operation at elevated RPM. The machined tooth profile maintains precise belt engagement, reducing wear on both pulley and belt and extending service life across extended track sessions or high-volume fuel demand scenarios.

This pulley is essential for builders and technicians upgrading fuel systems on high-output engines or installing aftermarket fuel pumps that require HTD belt drive configuration. Aeromotive fuel pump pulleys are recognized throughout the performance automotive community for dimensional accuracy and durability, making this component a direct-fit replacement or upgrade for systems already specified for HTD synchronous drive. The compact 3.65-inch outer diameter and lightweight 0.14-pound design integrate seamlessly into tight engine bay configurations without requiring structural modifications to the fuel system mounting.