Turner Motorsport Race Power Pulley Kit - E46/Z3

Unlock easy power for your BMW E46 or Z3

Free up real, useable performance by reducing accessory drag on the belt drive. This lightweight underdrive accessory pulley set for BMW E46 and Z3 models (with Bosch alternator) replaces the factory water pump, power steering and alternator pulleys with hard‑anodised T‑6061 aluminium items, plus a shorter multi‑rib belt for correct tension.

Designed for enthusiasts and track‑day drivers, this upgrade slows accessory speed by approximately 10 to 20 percent, cutting parasitic losses and releasing up to 11 bhp. Expect a freer‑revving feel and sharper response without touching the engine internals.

Why enthusiasts choose this upgrade

• Up to 11 bhp released by reducing parasitic load on the serpentine system
• Quicker rev build and more responsive acceleration on circuit
• CNC‑machined T‑6061 aluminium with a durable hard‑anodised finish
• Race‑spec alternator pulley for significant underdrive
• Complete accessory drive solution with correct length belt included

What you get

• Water pump pulley
• Power steering pulley
• Alternator pulley (race‑spec underdrive)
• Shorter serpentine belt

Compatibility

• BMW E46 3 Series and BMW Z3 fitted with a Bosch alternator
• Motorsport use only: recommended for off‑road and track applications

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.

Proven by us

We have installed this Turner Motorsport underdrive pulley set for customers and the feedback has been consistently positive: freer revving, stronger pull through the mid‑range and a noticeable reduction in accessory drag on track.

Search‑friendly terms

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