Achieve absolute chassis precision and eliminate unexpected rear-end alignment changes with the XC3 Engineering Rear Camber Lockout Shims. The factory BMW rear suspension uses an adjustable eccentric cam bolt to set rear wheel camber. Under heavy lateral loads, aggressive cornering, track-day use, or when hitting circuit curbs, these factory cam bolts are notoriously prone to slipping, instantly changing your suspension geometry and causing erratic handling.

The XC3 Rear Camber Lockout Shims permanently solve this issue by completely deleting the failure-prone factory eccentric washer system. By introducing a fixed, positive-location structural mounting plate, your rear camber settings remain completely locked in place under maximum track stress. Designed and manufactured in the UK, this kit provides vital reliability for track, clubsport, and time-attack builds.

Part Number: XC3-CLS-001

Key Features

– 4mm heavy-gauge precision laser-cut stainless steel lockout plates
– Deletes the factory eccentric cam bolt design to guarantee zero alignment slip
– Supplied with upgraded, high-tensile 12.9 specification replacement hardware
– Features a clean, laser-engraved XC3 Engineering logo
– Engineered, tested, and manufactured locally in the United Kingdom

Benefits

– Locks your custom rear camber settings permanently in place, even under heavy track abuse
– Prevents sudden rear-end snapping or traction loss caused by loose alignment hardware shifting mid-corner
– Maximizes cornering grip and tyre wear consistency by maintaining stable geometry
– Backed by the robust XC3 Engineering Lifetime Warranty for long-term structural reliability

Dimensions

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

FAQ

Q: Can I install these rear camber lockout shims with my stock rear camber arms?
A: No. Because these lockout plates secure the mounting bolt into a fixed position, you lose the ability to sweep the arm for camber adjustments. This kit must be paired with adjustable aftermarket rear camber links or arms where alignment modifications are made directly on the arm itself via a turnbuckle.

Q: Why should I install these alongside toe lockout shims?
A: The rear subframe utilizes eccentric bolts for both toe and camber adjustments. Under hard driving, both are susceptible to movement. We highly recommend running this camber lockout kit in tandem with our Rear Toe Lockout Shims (XC3-TS-001) to completely secure the rear suspension geometry.

Q: Does this kit include enough hardware for both sides of the car?
A: Yes, the XC3-CLS-001 kit is supplied as a complete rear axle set. It contains all the precision laser-cut stainless steel lockout shims and 12.9 high-tensile bolts required to fully 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.