PFR5-1920BLK – Rear Subframe Front Insert – M135i M140i M235i M240i

The Powerflex PFR5-1920BLK Rear Subframe Front Bush Insert is a Black Series polyurethane insert designed to stiffen the front mounting points of the rear subframe on BMW F2X/F3X models, including the M135i, M140i, M235i and M240i. This upgrade fills the voids in the OEM subframe bushes, greatly reducing flex and improving rear-end precision under high load conditions.

SKU: PFR5-1920BLK
Position: Rear Subframe – Front Bush Insert

Key Features

Black Series Polyurethane

– Hardest compound available from Powerflex
– Designed for track, drift and high-power applications
– Minimises subframe movement under acceleration and cornering

Enhanced Rear-End Stability

– Reduces chassis flex
– Keeps the rear subframe aligned during heavy load transitions
– Improves handling precision and consistency

Sharper Chassis Feel

– Tighter rear axle behaviour
– Increased confidence during fast direction changes
– Reduced rear-end float at higher speeds

Simple, Effective Upgrade

– Inserts into the OEM bush (no press needed)
– Low-cost, high-impact handling improvement
– Expected slight NVH increase due to Black Series stiffness

Benefits

The PFR5-1920BLK insert transforms the rear chassis dynamics of the F2X/F3X platform. By reducing subframe flex, the car feels more planted, more direct and more predictable — especially under hard acceleration and aggressive cornering. Ideal for M135i/M140i/M235i/M240i owners running fast-road, track or high-power 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

SKU: PFR5-1920BLK
Position: Rear Subframe – Front Insert

Installation Notes

– Fits directly into OEM front subframe bush
– No bush removal required
– Professional installation recommended
– Slight NVH increase expected due to motorsport stiffness

About Powerflex

Powerflex Black Series components are engineered for full motorsport applications. They offer maximum stiffness, precision and long-term durability under extreme driving conditions, making them a perfect match for high-performance BMW M-Lite builds.