Beta Pack BMW M135i M140i F20 F21

To progress. The Beta Pack takes the Omega Pack and builds on it.

1: Coilover suspension

Coilovers lower the car and are stiffer than stock. They provide better damping and more grip.

2: M2 front axle kit

A complete M2 front axle, made by Lemförder, the original equipment supplier, with its mounting shims. The F2x gets the front geometry of the M2: the difference is made in the chassis, not the engine.

3: Spherical rear toe arms

Spherical rear toe arms allow settings beyond the factory specification for track use. As standard, the F2x has bushings that compress under load and limit adjustment. They stabilise the rear and maximise cornering grip.

4: Subframe bushing inserts

They fill the voids in the four OEM subframe mounts and limit subframe movement relative to the body. The geometry holds in corners and the rear loses its spongy feel at the limit. Simple, reversible installation.

5: Adjustable anti-roll bar end links

They remove any residual preload in the anti-roll bars after corner weighting.

6: Front control arm spherical bearings

Front arm spherical bearings replace the OEM bushing and prevent it from deforming under load. They provide stable, precise geometry, even under braking, and better feedback to the driver.

7: Solid rear subframe mounts

BMW adopted them on the M3 E92 GTS, the M2 and the M4: they are the main difference between an M2 rear axle and that of an F2x. They prevent movement between chassis and subframe and help stiffen the rear axle.