SKU: MPP7331
MPN: 7331
The BBC Crank Pulley Natural Serpentine from March Performance is a precision-engineered crankshaft pulley designed specifically for Big Block Chevy engines running serpentine belt systems. Built for engine builders, hot rodders, and performance mechanics who demand reliable serpentine conversion on high-displacement platforms, this pulley eliminates the complexity of legacy V-belt setups while maintaining optimal cooling efficiency. The 7-inch diameter sizing is purpose-built to match OEM and aftermarket serpentine systems, making it an essential upgrade for modernizing classic Big Block powerplants.
Manufactured from aluminum and finished in a natural clear powder coat, the BBC Crank Pulley Natural Serpentine features a 6-rib serpentine groovepattern engineered for maximum belt grip and minimal slippage under load. The high water flow ratio design optimizes coolant circulation through a long water pump configuration, ensuring thermostat accuracy and preventing hot spots in extended-duration racing or street performance applications. All necessary hardware is included, allowing for straightforward installation without additional fastener sourcing. The lightweight aluminum construction reduces rotational inertia on the crankshaft, contributing to improved throttle response and fuel efficiency in daily-driven builds.
Ideal for Big Block Chevy platforms ranging from 427 to 496 cubic inches, the BBC Crank Pulley Natural Serpentine is the standard choice for engine swaps, restorations, and performance rebuilds where modern serpentine belt reliability is non-negotiable. Installation pairs seamlessly with contemporary alternators, water pumps, and power steering systems, simplifying the transition from traditional multi-belt layouts. Whether you're converting a vintage solid-lifter big block to street duty or optimizing cooling on a carbureted race engine, this pulley delivers the durability and precision fit that professional rebuilders expect. Weighing just 2.64 lbs, it minimizes rotating mass without compromising strength or structural integrity.
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