Powerflex PFR5-1927 Rear Differential Front Bush Insert Kit BMW 4 Series F32 F33 F36 (Coupe/Convertible/Gran Coupe) Polyurethane Diff Mount Insert 2x Inserts OE Ref 33316792513

Powerflex PFR5-1927 Final Drive Front Location Insert Set for BMW 4 Series F32 F33 F36

Transform the way your 4 Series puts power to the tarmac with this proven driveline upgrade. The Powerflex PFR5-1927 insert set reinforces the front position of the rear final drive mount by filling the cavities in the factory rubber bush. The result is a more planted rear end, cleaner power delivery and far less movement from the diff under load.

Why this upgrade works

• Limits differential movement to reduce wheel hop and drivetrain shunt during hard launches and gear changes
• Sharper throttle pick up and more consistent traction when accelerating out of bends
• Helps maintain geometry under load for improved stability and predictable handling
• High quality polyurethane resists oil, heat and ageing far better than standard rubber
• Insert design fits into the OE bush, so there is no need to press out the original component
• Backed by the Powerflex Lifetime Warranty for lasting peace of mind

In the box

• 2 x polyurethane front-location inserts for the rear final drive mount
• Diagram reference: 27
• Powerflex part number: PFR5-1927
• OE cross reference: 33316792513

Vehicle compatibility

Designed for BMW 4 Series F32 Coupe, F33 Convertible and F36 Gran Coupe. This insert kit sits inside the original front differential bush to support the mount and control movement without replacing the entire bush.

Real-world results

We use these inserts on our own builds and have fitted them for many customers. Feedback is consistently positive: crisper power transfer, better grip on uneven surfaces and a more connected feel from the rear axle on fast road and track.

Professional fitting available

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Ideal for

• Fast road driving and track days
• Mapped and higher torque builds
• Drivers wanting to cut wheel hop and enhance rear-end control

Why choose Powerflex

• Engineered polyurethane for durability and performance
• Improves tyre contact and reduces premature tyre wear
• Excellent long-term value with a lifetime warranty

Search-friendly terms

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