The Powerflex PFF5-4020 Engine Mount Insert Kit is a Fast Road polyurethane upgrade that reduces engine movement and sharpens drivetrain response on BMW F2X/F3X M-Lites (M135i, M140i, M235i, M240i) and F8X M-cars (M2, M3, M4). Designed to fill the voids in the OEM rubber mounts, this insert improves throttle response, shift feel and engine stability under load, while keeping NVH at a sensible level for daily use.

SKU: PFF5-4020
Position: Engine Mount – Insert Kit
Application: Fast Road / Performance

Key Features

Fast Road Polyurethane

– Stiffer than OEM rubber without excessive NVH
– Reduces engine rock during hard acceleration
– Improves engine control for spirited driving and tuned cars

Sharper Throttle & Gearshift Response

– Reduces drivetrain delay and movement
– Gives a cleaner, more connected shift feel
– Helps maintain power delivery under load

Better Engine Stability

– Limits movement during braking, acceleration and cornering
– Reduces stress on downpipes, exhausts and drivetrain components
– Supports higher power levels more effectively than OEM mounts

Insert-Style Upgrade

– Fits into the original engine mounts
– No removal or pressing required
– Quick installation and strong performance gains

Benefits

The PFF5-4020 insert kit provides a tighter, more responsive driving experience for both M-Lites and M-cars. It reduces the sloppy movement of OEM mounts, improving drivability and precision without the harshness of full Black Series mounts. Ideal for Stage 1–2 cars or drivers wanting a firmer, more connected feel.

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: PFF5-4020
Position: Engine Mount Insert Kit

Installation Notes

– Inserts into existing mounts
– No press or mount removal required
– Slight NVH increase compared to OEM
– Professional fitting recommended
– Pairs well with transmission and diff mount upgrades

About Powerflex

Powerflex Road Series components offer improved stiffness, stability and longevity while maintaining comfort. Ideal for fast-road BMW builds and lightly tracked cars wanting sharper dynamics without going full motorsport.