Description
Improve your Subaru's engine response with the COBB Tuning Black Lightweight Main Pulley, a precision-engineered replacement for the factory crankshaft pulley. Designed to reduce rotational mass while maintaining the factory pulley diameter, this lightweight upgrade helps reduce the rotating weight driven by the engine, supporting improved engine response and acceleration characteristics.
The COBB Lightweight Main Pulley is CAD-designed and CNC-machined from billet 6061-T6 aluminum, providing a durable, precision-manufactured component for performance-oriented Subaru applications. Its anodized black finish adds a clean, understated appearance to the engine bay while providing a protective surface suited to demanding under-hood conditions.
Unlike underdrive pulleys, this COBB pulley retains the factory diameter and original accessory drive belt surface design. This approach is intended to preserve the factory accessory drive ratio rather than reducing accessory speed, helping avoid potential charging and electrical issues associated with underdrive pulley designs.
Manufactured by COBB Tuning, this lightweight main pulley is an excellent option for Subaru enthusiasts seeking a rotational-mass reduction upgrade without changing the factory pulley diameter.
Key Features
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Manufactured by COBB Tuning.
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Lightweight main crankshaft pulley replacement.
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Black anodized finish.
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CAD-designed for precision.
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CNC-machined from billet 6061-T6 aluminum.
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Designed to reduce rotational mass compared with the factory pulley.
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Manufacturer-stated weight reduction of up to 4 lbs compared with the stock unit.
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Maintains the factory pulley diameter.
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Designed to preserve the factory accessory drive ratio.
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Retains the stock drive belt surface configuration for straightforward installation.
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Helps reduce rotating mass to support improved engine response.
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Designed for compatible Subaru applications.
Fitment
Compatible Subaru applications, excluding 2010 and newer Subaru Legacy models.
The exact supported models and model years should be confirmed against the COBB Tuning part number before ordering.
Fitment Exclusion: Not intended for 2010+ Subaru Legacy models.
Confirm compatibility with your specific Subaru model, model year, engine, and accessory belt configuration before purchase.
Installation & Compatibility Notes
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Verify the pulley is compatible with the vehicle's engine and factory accessory drive system.
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Inspect the accessory belt and related components before installation.
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Follow the manufacturer's installation instructions and torque specifications.
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Ensure the pulley is correctly aligned and securely installed.
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Although the factory pulley diameter is retained, confirm compatibility with any existing aftermarket accessory drive components.
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Actual changes in engine response depend on the vehicle's configuration and other modifications.
