Turner Motorsport S54 Power Pulley Kit - E46 M3 / Z3M

Lightweight Underdrive Pulley Upgrade for BMW M3 E46 and Z3 M S54

Free up real horsepower and sharper response with this Turner Motorsport auxiliary drive pulley set. By reducing parasitic load from the alternator, power steering and coolant pump, this bolt-on mod releases power that would otherwise be wasted. Expect gains of up to 10 bhp on a standard car, with improved driveability on road and track.

Why enthusiasts choose this pulley set

• Underdrive design reduces accessory speeds by approximately 10 to 20 percent, lowering drag and unlocking free performance
• Noticeably crisper throttle response and stronger mid-range pull
• CNC machined from 6061-T6 aluminium for strength and low rotating mass
• Hard anodised black finish for heat, chemical and wear resistance
• OE-style appearance with precise fitment for the S54 straight-six
• Charging, cooling and steering systems continue to operate as intended after extensive road and circuit validation
• Durable billet alloy pulleys replace fragile composite items for long-term reliability
• No mapping required and perfect for fast road, track day and club motorsport builds

Fitment

Designed for the BMW M3 E46 and BMW Z3 M fitted with the S54 engine.

What you get

A premium Turner accessory drive reduction kit engineered to reduce rotational losses and liberate usable power without compromising everyday usability.

Real-world results

We have installed this upgrade on customer cars and our own builds. Feedback is consistently positive, highlighting smoother revs, a keener pick-up and a measurable increase on the dyno. It is a simple, high-value performance part that complements breathing and exhaust modifications.

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Installation

Professional fitting available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and scheduling. We are happy to advise on complementary upgrades and maintenance while the belt drive is accessible.