Powerflex Black Series PFR5-4613BLK Rear Subframe Rear Bush Insert for BMW E46 (incl M3) & Z4 E85/E86/E89 | 95A Polyurethane Performance Upgrade

Powerflex Black Series PFR5-4613BLK Rear Cradle Bushing Insert for BMW 3 Series E46 including M3 and BMW Z4 E85 E86 E89 | 95A Polyurethane Handling Upgrade

Part number: PFR5-4613BLK

Unlock sharper handling and rock-solid rear-end control with the Powerflex Black Series PFR5-4613BLK rear cradle insert. Engineered in 95 Shore A polyurethane, this performance insert fits into the cavities of the factory rear carrier bush to curb flex, stabilise the rear axle and keep geometry consistent when cornering, accelerating and braking. A go-to chassis upgrade for spirited road use, track days, drifting, time attack and racing on BMW E46 models including M3 CSL, plus BMW Z4 E85 E86 and E89 including Z4M.

If you are chasing a tighter rear end, crisper turn-in and better traction without the hassle of a full bush press, this insert is the smart solution. It supports the OE rubber, reduces unwanted movement and gives your BMW the planted feel enthusiasts want from a proper suspension upgrade.

Why choose this Black Series insert

• High-durometer 95A polyurethane helps lock down the rear carrier for predictable chassis behaviour
• Fits into the voids of the standard mount to limit deflection and alignment change under load
• Improves stability on throttle and under braking with enhanced corner exit grip
• Built for fast road and competition environments with excellent durability compared to rubber
• Great value handling gain as an insert that complements the OE bush

What is included

• 2 x rear cradle rear bushing inserts
• Vehicle requires 2 inserts per car

Fitment and applications

Fits into the voids of the original rear carrier rear bush on the following:

• BMW 3 Series E46 Compact
• BMW 3 Series E46 Saloon, Touring, Coupe, Convertible
• BMW E46 M3 including CSL
• BMW E46 Xi and XD all-wheel drive
• BMW Z4 E85 and E86 2003 to 2009
• BMW Z4 E89 2009 onward
• BMW Z4M E85 and E86 2006 to 2009

OEM cross-reference

• 33316770781
• 33312283419

Manufacturer

Powerflex

Diagram reference

Reference No. 11

Real-world results

At MJ Modifications we have fitted this part for our own cars and customer builds and the difference is immediate. Owners report a more connected rear axle, improved confidence through fast sweepers and better traction with very little extra cabin vibration for the gain in precision.

Compatibility check before dispatch

We verify fitment before we ship. Add your UK registration or the last 7 of your VIN at checkout and we will confirm that PFR5-4613BLK is correct for your BMW.

Professional installation

Prefer expert fitting. MJ Modifications in Warwickshire offers professional installation. Request a fitting quote at info@mjmodifications.co.uk.

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