Powerflex Track Engine Mount Insert Kit - F30, F31, F34 3 Series PFF5-4020BLK

BMW F3x motor mount upgrade for sharper response and rock-solid drivetrain control

Transform the way your F30, F31 or F34 3 Series reacts to throttle inputs and gear changes with this polyurethane motor mount insert set. This Black Series solution fills the voids in the original engine mounts to curb excessive movement under load, giving you crisp pedal feel, tighter shifts and more immediate power delivery on track days and fast road driving.

Part number: PFF5-4020BLK

Why enthusiasts choose this poly insert kit

• Reduces drivetrain rock for cleaner, faster gear engagement
• Improves throttle precision and traction when accelerating out of corners
• Delivers a more direct connection between the engine and subframe
• Helps protect the factory mounts from premature wear
• Ideal for mapped and track-used builds seeking consistent performance

Track-proven Black Series compound

Manufactured in a 95 Shore A polyurethane Black Series compound, these inserts are engineered for maximum control of mount geometry. They are a superb alternative to full solid mounts or heavy aluminium blocks, giving serious stiffness with practical usability for performance-focused owners.

Fast, fuss-free installation

• Designed to slot into the cavities of the factory engine mounts
• Can be fitted without removing the original mounts from the car
• Supplied as a pair to treat both sides

Fitment and references

• Chassis: BMW F30 Saloon, F31 Touring, F34 Gran Turismo 3 Series
• Replaces OE mount references: 22112284817 and 22112284818
• Diagram reference: 21
• Quantity in pack: 2 inserts

What to expect

As with any stiffer mount insert, a modest increase in cabin vibration at idle is normal. This is a trade-off enthusiasts accept for the gains in control, consistency and feedback.

Real-world results from MJ Modifications

We run this setup on our own cars and customer builds, and feedback is consistently positive. Drivers report tighter driveline control, reduced wheel hop and more confidence when pushing hard on circuit or B-road.

Professional fitting available

Want it installed correctly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Search-friendly terms you might be looking for

BMW F30 motor mount insert, F31 engine mount bush upgrade, F34 poly mount, 3 Series drivetrain mount insert, performance motor mount stiffeners, Black Series poly bush, torque mount insert, track day engine mount upgrade, fast road mount bush.