PFR5-1220BLK – Rear Subframe Front Anti-Squat Bush – M135i M140i M235i M240i

The Powerflex PFR5-1220BLK Rear Subframe Front Anti-Squat Bush is a Black Series motorsport upgrade designed for BMW F2X/F3X models including the M135i, M140i, M235i and M240i. This bush replaces the soft OEM mount with a much stiffer polyurethane design to dramatically reduce anti-squat movement, improve traction and sharpen chassis control under hard acceleration, cornering and braking.

SKU: PFR5-1220BLK
Position: Rear Subframe – Front Anti-Squat Bush
Application: Track / Msport

Key Features

Black Series Motorsport Polyurethane

– Maximum stiffness for track, drift and high-power builds
– Eliminates excessive anti-squat movement
– Provides immediate chassis response under load

Sharper Rear-End Control

– Reduces subframe shift during acceleration
– Improves traction and stability
– Enhances chassis precision in fast direction changes

Improved Handling Dynamics

– Far more predictable rear axle behaviour
– Better weight transfer control
– Ideal for high-grip tyres, coilovers and tuned M-Lites

Direct Replacement Upgrade

– Replaces the OEM rubber bush (not an insert)
– Long-life polyurethane construction
– Maintains geometry under extreme forces

Benefits

The PFR5-1220BLK bush significantly tightens the rear section of the F2X/F3X chassis. Anti-squat behaviour is improved, meaning the rear does not compress excessively under throttle, giving more consistent traction and sharper corner exit performance. A must-have upgrade for track cars, drift builds and seriously tuned M135i/M140i/M235i/M240i setups.

Fitment

Suitable for:
– BMW M135i (F20/F21)
– BMW M140i (F20/F21)
– BMW M235i (F22/F23)
– BMW M240i (F22/F23)
– Also compatible with many RWD F2X/F3X models running performance suspension

SKU: PFR5-1220BLK
Position: Rear Subframe – Front Anti-Squat Mount

Installation Notes

– Replaces OEM bush (pressing required)
– Professional installation recommended
– NVH increase expected due to motorsport specification
– Best paired with other Black Series subframe and diff bushes for full chassis control

About Powerflex

Powerflex Black Series bushes are engineered for motorsport and extreme performance. Offering maximum stiffness, alignment precision and long-term durability, they’re a top choice for BMW M-Lite owners building serious fast-road or full track cars.