PFF5-4021BLK – Engine Mount Insert Kit – M135i M140i M235i M240i M2 M3 M4

The Powerflex PFF5-4021BLK Engine Mount Insert Kit is a Black Series polyurethane upgrade designed to reduce engine movement and sharpen drivetrain response across BMW F2X/F3X M-Lites (M135i, M140i, M235i, M240i) and F8X M-cars (M2, M3, M4). By filling the voids in the factory rubber engine mounts, this insert dramatically improves throttle response, shift precision and overall engine stability under hard acceleration, braking and cornering.

SKU: PFF5-4021BLK
Position: Engine Mount – Insert Kit
Application: Black Series (Motorsport)

Key Features

Black Series Motorsport Polyurethane

– Maximum stiffness for aggressive driving and high-power builds
– Controls engine movement far better than OEM rubber
– Suitable for track, drift and high-torque street applications

Sharper Throttle & Shift Response

– Reduces engine rocking under load
– Improves response during fast gear changes
– Enhances drivetrain precision and feedback

Increased Engine Stability

– Keeps engine aligned during acceleration and direction changes
– Reduces stress on exhaust systems and driveline components
– Ideal for tuned and mapped engines

Simple Insert-Style Upgrade

– Installs into the existing OEM engine mounts
– No press or mount removal required
– Lower cost alternative to full solid/poly engine mounts

Benefits

The PFF5-4021BLK insert kit delivers a tighter and more responsive driving feel on both M-Lites and M-cars. Engine movement is significantly reduced, gear shifts feel cleaner and the car becomes more predictable under load. Ideal for Stage 1–2 F2X/F3X builds and all S55-powered F8X cars used for fast road or track.

Fitment

Suitable for:

F2X/F3X M-Lites:
– BMW M135i (F20/F21)
– BMW M140i (F20/F21)
– BMW M235i (F22/F23)
– BMW M240i (F22/F23)

F8X M-cars:
– BMW M2 (F87 – N55 + S55)
– BMW M3 (F80)
– BMW M4 (F82/F83)

SKU: PFF5-4021BLK
Position: Engine Mount Insert Kit

Installation Notes

– Installs into the existing engine mounts
– No press tools required
– NVH increase expected (Black Series stiffness)
– Professional installation recommended
– Ideal for mapped or track-driven cars

About Powerflex

Powerflex Black Series components are designed for motorsport use, providing maximum stiffness, alignment precision and long-term durability under extreme loads. Perfect for serious performance BMW builds.