Powerflex PFR5

BMW 6 Series E63 E64 Rear Crossmember Rear Mount Insert Bushes | Powerflex PFR5-721

Transform the rear-end precision of your 2003 to 2010 BMW 6 Series with this Powerflex insert kit, part number PFR5-721. By filling the voids in the factory rubber carrier mounts, these polyurethane inserts curb cradle shift, tighten up the chassis, and deliver cleaner turn-in, stronger traction out of bends, and greater confidence at speed. Ideal for fast-road driving without sacrificing comfort.

• Direct-fit insert kit for the rear crossmember rear mounts on BMW E63 and E64 models
• Durable polyurethane construction resists deformation and ageing better than rubber
• Limits rear cradle movement for crisper steering response and consistent geometry
• Helps cut wheel hop and axle tramp under hard acceleration
• Improves braking stability and maintains better tyre contact with the tarmac
• Balances performance with controlled NVH for everyday usability
• Backed by the Powerflex Lifetime Warranty

What is included

• Contents: 2 insert bush pieces
• Diagram reference: 21
• Position: Rear crossmember rear mounting points
• Powerflex part number: PFR5-721
• OEM cross reference: 33316770826

Fitment details

Designed for BMW 6 Series E63 and E64 vehicles from 2003 to 2010. This is an insert that fits into the voids of the original equipment rubber mount to reduce excess movement while keeping refinement. If you need a full replacement bush, choose Powerflex PFR5-722.

Why upgrade to polyurethane inserts

Factory bushings soften and compress over time, allowing the rear carrier to shift under load. Polyurethane insert bushes control that deflection, keeping alignment more consistent for sharper handling, improved safety and more even tyre wear, with outstanding longevity and long-term value.

• More precise handling and cornering stability
• Enhanced braking feel and predictability
• Prolonged tyre life through reduced irregular wear
• Excellent durability in all weather conditions

Real-world results

We have installed this kit on our own builds and for customers. Feedback is consistently positive, with a noticeably more planted rear end, cleaner lines through bends and reduced vagueness from the back of the car, especially on fast road drives.

Professional installation

Fitting by a specialist is recommended. Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk and our team will be happy to help.

Search-friendly terms

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