Engines and Components› Belts and Pulleys

MS

DualDrive Underdrive Pulley Kit with Belts

$349.00

SKU: 10.00.010

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Macht Schnell E9X M3 Underdrive Pulley Kit is a performance upgrade designed to increase horsepower and torque.

Machined from 6061-T6 aerospace aluminum, these pulleys are lightweight and strong, with a T3 hard anodized finish for durability. The DualDrive design replaces the Crank Accessory and Power Steering Pulleys to reduce parasitic drag from accessories. This kit includes new belts for a simple bolt-on installation.
Show original supplier description
The Macht Schnell E9X M3 Underdrive Pulley Kit offers a significant performance boost for your vehicle's engine without compromising reliability. This upgrade is ideal for enthusiasts seeking improved performance both on the track and the street. The DualDrive design ensures a balance between increased performance and accessory functionality. This kit is designed to provide an estimated 9-14 HP and 7-9 ft-lbs of torque gain for the M3, and 18-20 HP and 16-20 ft-lbs of torque for M5/M6 models. The pulleys do not affect crankshaft dampening or harmonics, and all factory balancing is maintained. Installation is straightforward as a bolt-on process, and the kit comes complete with new belts. The design maintains proper cooling temperatures and ensures sustained alternator speed, which is crucial for sensitive control modules. Proper operation of all accessories is retained at moderate levels, even under demanding conditions.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMS
Part Number10.00.010
CategoryEngines and Components
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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