PFF5-4021 – Engine Mount Insert Kit

The Powerflex PFF5-4021 Engine Mount Insert Kit is a Road/Fast Road polyurethane upgrade designed to reduce engine movement and sharpen drivetrain response across BMW F2X/F3X M-Lite models (M135i, M140i, M235i, M240i) and F8X M-cars (M2, M3, M4). This insert fills the voids in the OEM rubber engine mounts to provide improved throttle response, tighter shifts and better engine stability under load, without the extreme NVH of the Black Series version.

SKU: PFF5-4021
Position: Engine Mount – Insert Kit
Application: Fast Road / Performance

Key Features

Fast Road Polyurethane

– Stiffer than OEM rubber for improved control
– Reduced engine rock during hard acceleration
– Maintains good comfort for daily-driven cars

Improved Throttle & Shift Precision

– Sharper response during rapid gear changes
– More direct power transfer
– Reduces delay caused by soft engine mounts

Increased Engine Stability

– Helps maintain correct engine position
– Reduces stress on exhaust, turbo and driveline components
– Improves consistency during spirited driving

Easy Insert-Style Upgrade

– Fits into the existing OEM mounts
– No mount removal or press tools needed
– Affordable, high-impact upgrade for both platforms

Benefits

The PFF5-4021 insert kit offers a noticeable improvement in throttle response and driveline control on both M-Lites and M-cars. It removes the mushy OEM mount flex, giving the car a more connected and predictable feel, especially during fast-road driving and light track use.

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: PFF5-4021
Position: Engine Mount Insert Kit

Installation Notes

– Installs into the existing engine mounts
– No pressing required
– Slight NVH increase compared to OEM
– Professional fitting recommended
– Ideal for tuned or fast-road builds

About Powerflex

Powerflex Road Series components provide improved precision, longevity and control compared to OEM rubber while maintaining everyday usability. Perfect for drivers who want tighter, more responsive performance without sacrificing comfort.