Powerflex PFF5-4020 Poly Engine/Motor Mount Insert Bushing Kit for BMW F3x 3 Series F30 F31 F34 (Saloon, Touring, GT) | 70A Road Series Void Insert Upgrade | Fits OE 22112284817/22112284818

Powerflex PFF5-4020 Poly Insert Bushings for BMW 3 Series F30 F31 F34

Transform the way your F3x drives with the Powerflex PFF5-4020 engine mounting insert kit. This high quality polyurethane void insert tightens up the factory powertrain mounts to curb excessive engine rock, delivering cleaner gear changes, sharper throttle response and more direct acceleration without sacrificing day-to-day comfort. A proven street and fast-road upgrade for BMW 3 Series enthusiasts who want a crisper, more connected feel from their car.

What you will feel

• Reduced drivetrain movement for improved shift precision and traction on throttle
• More immediate response when accelerating and lifting off
• Greater stability under hard launches and cornering transitions
• Minimal increase in cabin NVH thanks to 70 Shore A compound tuned for road use
• Inserts fit with the original mounts in place to keep installation quick and tidy
• Helps extend the service life of your OE engine mounts by limiting excessive flex

Why choose this upgrade

If you want a noticeable improvement in driveline control without jumping to solid or competition mounts, these Road Series poly inserts are the sweet spot. They fill the voids in the standard mounts to control movement under load, giving you confidence on B-roads and reliability for daily driving. We have installed these for customers and run them on our own builds. Feedback is consistently positive, citing smoother power delivery and a tighter, more engaging drive.

Specification

• Part number: PFF5-4020
• Series: Powerflex Road Series
• Material: Polyurethane, Yellow 70A durometer
• Pack contents: 2 inserts
• Diagram reference: 21
• Works with OE mount references: 22112284817, 22112284818

Compatibility

BMW 3 Series:

• F30 Saloon
• F31 Touring
• F34 Gran Turismo

Installation and NVH

Designed to fit alongside the factory mounts without removing them, which keeps fitting time down. Expect a small rise in vibration at idle compared with stock. The 70A compound offers an excellent balance for spirited road driving.

Professional fitting

Prefer a hassle-free install with alignment checked and torque settings done right. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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