Pulley 40T

The Pulley 40T from K.S.E. Racing is a precision-engineered serpentine pulley system designed for high-performance automotive applications and engine modifications. Built for enthusiasts who demand reliable belt drive efficiency, this 40-tooth pulley serves as a critical component in custom engine builds, supercharger installations, and aftermarket accessory drive systems. Whether you're optimizing cooling performance, managing alternator output, or integrating complex accessory packages, the Pulley 40T delivers the mechanical precision required for demanding motorsports and street performance platforms.

K.S.E. Racing's Pulley 40T features precision-machined construction that ensures consistent belt engagement and minimal runout, critical factors in preventing slippage and belt wear during sustained high-RPM operation. The 40-tooth design delivers optimal gear ratios for accessory drive management, allowing tuners to balance water pump flow, alternator charging rates, and power steering pump output without sacrificing belt longevity. Compact at just 5.5 inches in diameter and weighing only 0.37 pounds, this pulley minimizes rotating mass while maintaining structural rigidity necessary for extreme duty cycles typical in forced induction and modified engine environments.

This pulley benefits mechanics, engine builders, and performance tuners who require verified OEM-quality components for crate engine assembly, turbo and supercharger installations, and comprehensive engine bay restorations. The Pulley 40T integrates seamlessly into serpentine belt systems where precise diameter and tooth count directly influence accessory output and belt tension geometry. Installation requires verification of shaft bore compatibility and belt width specification with your engine platform; consult your engine manufacturer's accessory drive schematic before ordering to ensure proper fitment and rotational clearance.