Description
Elevate your MINI Cooper’s performance with the M7 Speed 4% Oversize Crankshaft Pulley, designed to increase power, acceleration, and throttle response by safely enhancing supercharger speed. This precision-engineered pulley provides a noticeable boost in low-end torque, giving your MINI sharper acceleration and a more responsive driving experience.
Lightweight Performance
Weighing just 13 ounces—a remarkable 88.5% lighter than the factory pulley—this lightweight design reduces crankshaft rotational mass, translating directly into increased horsepower, torque, and improved throttle response. By minimizing the engine’s rotational inertia, the M7 Speed Crank Pulley allows your MINI to rev faster and respond more dynamically under load.
Precision Design & Construction
Crafted in the USA from billet 6061-T6 aerospace-grade aluminum, this pulley is CNC-machined for high precision and finished with a deep black anodized coating and laser-etched detailing. Its Micro V-Belt grooves are machined to SAE J1459 specifications, ensuring minimal belt slippage even under maximum boost conditions.
The M7 Speed Crank Pulley features an industry-exclusive interference fit, eliminating high-RPM pulley slippage common in aftermarket solutions. Supplied with a high-quality ARP Racing bolt and precision-ground flat washer, installation is secure and reliable.
Installation Made Simple
Installation is straightforward: heat the pulley to 275–300°F (135–150°C) using an oven, propane torch, or heat gun. The pulley will slip effortlessly onto the crankshaft and, upon cooling, achieves a tight, interference fit. Secure with the supplied ARP bolt and washer to complete your upgrade.
Key Features:
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Super lightweight: 13 ounces, saving 6.2 lbs (2.8 kg) from stock
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Reduces damper weight by 88.5%
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Symmetric design for perfect balance
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Interference thermal fit to eliminate crankshaft slippage
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Micro V-Belt grooves machined to SAE J1459 specifications
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Supplied with high-strength ARP Racing bolt and precision washer
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Made in the USA from billet 6061-T6 aluminum
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Compatible with 02–06 Mini Cooper Hatchback, 05–08 Mini Cooper Convertible
Performance Tested and Proven
Each M7 Speed product is engineered, tested, and proven to deliver maximum performance and reliability, making it the ultimate upgrade for any supercharged MINI Cooper enthusiast. Pair with the M7 Speed 16% Supercharger Pulley for even greater boost and performance gains.
