Powerflex PFF5-4020 Polyurethane Engine/Motor Mount Insert Bushings Kit for BMW 4 Series F32 F33 F36 (F3x) - Road Series Yellow 70A - Mount Infill Upgrade - Replaces OE 22112284817/22112284818

Powerflex PFF5-4020 Poly Motor Mount Insert Set for BMW 4 Series F32, F33, F36

Transform the way your 4 Series drives with this precision-made polyurethane motor mount insert set. Part number PFF5-4020 is a proven upgrade that tightens up drivetrain movement, sharpens accelerator response, and gives cleaner, more consistent shifts. If you want a more connected feel without jumping to solid mounts, these performance inserts are the sweet spot for road-focused builds.

Crafted in Yellow 70A polyurethane from the Powerflex Road Series, the inserts infill the voids in the factory mounts to control engine rock under load. You get better torque delivery to the tyres, reduced driveline shunt, and less wheel hop on poor surfaces, with only a small increase in cabin noise at idle. We use these on our own cars and customer vehicles, and the feedback is exactly what keen drivers want: crisper response, improved balance on and off throttle, and a more planted front end.

Key advantages

• Limits engine movement for a tighter, more precise drivetrain
• Improves shift quality and clutch engagement feel
• Cleaner torque transfer for stronger acceleration
• Helps extend the life of the factory mounts
• Low increase in noise and vibration, generally noticeable only at idle
• Ideal for daily-driven performance and spirited road use
• Typically installs with the mounts still on the vehicle, no press required

Compatibility

BMW 4 Series F32 Coupe, F33 Convertible, F36 Gran Coupe.

What is included and technical info

• Part number: PFF5-4020
• Series: Powerflex Road Series
• Material and hardness: Yellow polyurethane, 70A
• Quantity in pack: 2 inserts
• Diagram reference: 21
• Replaces OE numbers: 22112284817, 22112284818

Note: Powerflex also produces PFF5-4021 within the same platform range.

Installation and fitting

These inserts are designed to fit into the voids of the original mounts and can typically be installed in situ. For a hassle-free experience, we offer professional fitting at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Why choose Powerflex polyurethane

Powerflex Road Series components enhance chassis control by reducing unwanted flex in critical areas. Expect improved stability, better tyre contact, and consistent performance over time compared to ageing rubber.

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Upgrade to PFF5-4020 today for a more responsive, more engaging 4 Series that feels great on every drive.