SKU: KRC40150300
UPC: 819495014771
MPN: KRC 40150300
The Alt. Ply 3 Groove Serp 3.5in Diameter serpentine pulley is a precision-engineered accessory drive component designed for serious engine builders and high-performance automotive enthusiasts. This alternator pulley replaces OEM units on modified engines where belt tension optimization and accessory load management are critical.
Whether you're running a supercharged build, upgrading to larger alternators, or fine-tuning accessory drive geometry on a custom short-block, this 3.5-inch diameter pulley delivers the necessary groove configuration to maintain proper serpentine belt alignment and tension across multiple accessories. The alternate-ply construction provides durability under sustained high RPM operation and thermal cycling common in performance applications.
Custom engine builders and turbocharged vehicle owners benefit most from this component when reconfiguring their setups. The lightweight design (0.32 lbs) reduces parasitic drag on the crankshaft, freeing additional horsepower while minimizing bearing loads on both the alternator and engine block.
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