Drivetrain› Differentials and Rear-End Components

M Factory

Helical Limited Slip Differential

$799.95

SKU: MF-TRS-05IB6

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The MFactory Helical Limited Slip Differential is a performance drivetrain component designed for the Ford Fiesta and Focus ST180 equipped with the IB6 transmission. It improves traction by distributing power smoothly and consistently to the wheels during cornering and acceleration.
Show original supplier description
The MFactory Helical Limited Slip Differential provides a significant performance advantage for Ford Fiesta and Focus ST180 models featuring the IB6 transmission. By ensuring smooth and constant power distribution, this torque-biasing differential helps maximize tire traction and minimize parasitic drivetrain losses, making it suitable for street, track, and drag racing applications. Constructed from forged, high-nickel-chromium-molybdenum steel (SAE 4320 and SAE 9310), the unit undergoes double tempering and sub-zero treatment for enhanced toughness, with advanced shot peening used to increase surface hardness. The helical gear geometry was developed using Solidworks 3D CAD and Cosmos FEA software to meet exact tolerances, ensuring a direct-fit installation. This maintenance-free design eliminates the need for the special fluids and frequent rebuilds typically required by plate-type limited-slip differentials. As a 2nd generation design, this differential offers high efficiency and lock-free operation that avoids negatively impacting steering response.

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

BrandM Factory
Part NumberMF-TRS-05IB6
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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