Turner Motorsport Underdrive Pulley Kit for BMW E46 M3 S54 (S54B32) – Lightweight Billet Aluminium Serpentine/Accessory Racing Pulleys, Track Day & Time Attack Upgrade, CSL Style

Competition underdrive pulley kit for BMW E46 M3 S54

Unlock free power from your S54 with this Turner Motorsport lightweight accessory drive upgrade. By reducing parasitic drag from the belt system, this race-focused pulley set helps your E46 M3 rev more freely, feel sharper out of corners and deliver stronger performance on circuit. It is a motorsport-grade solution for drivers building a track day, time attack or club racing M3.

Turner’s kit uses CNC machined 6061-T6 billet aluminium with a hard-anodised black finish for outstanding durability and a subtle, OEM-style look. The reduced rotational mass and revised drive ratio mean the engine wastes less effort turning ancillary components, so more of that energy can be directed to the rear wheels. The result is crisper throttle response and a more eager S54B32 without compromising fit or alignment.

• High quality billet aluminium pulleys with hard-anodised coating for wear and heat resistance
• Underdrive design that lessens accessory load for increased usable power and faster engine response
• Track proven reliability from a trusted motorsport brand
• OEM-like fitment and belt tracking for a clean, factory-style installation
• Ideal for track day, sprint, hillclimb and circuit builds where every advantage counts

We use this package on our own builds and customer cars, and feedback has been consistently excellent for responsiveness, quality and longevity. If you are chasing lap time and want a straightforward, bolt-on performance upgrade for your E46 M3’s accessory drive, this is a superb choice.

Important usage note

For competition use only. Due to the aggressive charging system underdrive, voltage output at low engine speed can drop. This kit is not recommended for road vehicles or situations with extended idling.

Vehicle compatibility

• BMW E46 M3 with S54 3.2 straight six

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Professional fitting

Installation available at MJ Modifications in Warwickshire. For a fitting quote or workshop booking, email info@mjmodifications.co.uk.