Improve the rear suspension geometry and handling precision of your vehicle with the XC3 Engineering Rear Toe Lockout Shims. On the factory BMW rear subframe, the native toe adjustment relies on an eccentric cam bolt that is highly prone to slipping under heavy lateral loads, hard cornering, circuit track use, or aggressive alignment specs—leading to unpredictable rear-end handling and compromised geometry.

By replacing the unstable OEM eccentric system with a fixed, positive-location design, these lockout shims lock your chosen toe setting permanently into position. Precision engineered and manufactured right here in the UK, this kit is an essential mechanical upgrade for any enthusiast tracking their car or running XC3 Billet Adjustable Toe Arms or aftermarket adjustable arms.

Part Number: XC3-TS-001

Key Features

– 4mm heavy-gauge precision laser-cut stainless steel plates
– Eliminates the factory eccentric cam bolt setup to prevent alignment slip
– Supplied with upgraded, high-tensile 12.9 specification replacement hardware
– Features a clean, laser-engraved XC3 Engineering logo
– Designed, tested, and manufactured in the United Kingdom

Benefits

– Guarantees your custom rear toe alignment remains completely locked under extreme track conditions
– Prevents sudden, unpredictable mid-corner rear geometry changes for greater driver confidence
– Eliminates tyre wear patterns caused by loose or shifting factory eccentric hardware
– Backed by the comprehensive XC3 Engineering Lifetime Warranty against structural failure

Dimensions

– Thickness: 4.0mm
– Material: High-strength raw stainless steel alloy
– Hardware Grade: 12.9 High-Tensile specification

FAQ

Q: Can I use these toe lockout shims with my factory rear toe arms?
A: No. Because these plates lock the bolt into a fixed position, you lose the ability to sweep the factory arm for adjustment. This kit must be paired with adjustable aftermarket toe arms (such as our XC3 Billet Adjustable Toe Arms) where alignment changes are adjusted directly on the arm itself.

Q: Why do the factory eccentric alignment bolts slip?
A: Under hard track braking or high-G cornering, the forces exerted through the rear suspension links easily overcome the clamping friction of the standard BMW eccentric washers, forcing the bolt to rotate within its slotted subframe pocket and ruining your alignment.

Q: Does this kit include alignment hardware for one side or both sides?
A: The XC3-TS-001 kit is supplied as a complete axle set, containing all the lockout plates and high-tensile hardware required to convert both the left and right sides of the rear suspension.

Fitment

– 2016-2021 BMW F8X M2 / M3 / M4 (Inc. Competition & CS)
– 2020-2025 BMW G8X M2 / M3 / M4 (Inc. Competition, xDrive & CSL)

If you are unsure on fitment, please message us with your registration or VIN and we will confirm compatibility before purchase.