Powerflex Black Series Rear Subframe Front Bush Insert Kit (2pc) for BMW 3 Series F30 F31 F34 - Track 95A Polyurethane - PFR5-1920BLK - Replaces OEM 33316792509

Rear Axle Carrier Front Insert Pair - Powerflex Black 95A - BMW 3 Series F30 F31 F34 - PFR5-1920BLK

Transform the way your F3x 3 Series puts power to the ground. This Powerflex Black Series rear axle carrier front insert kit locks down the rear cradle to keep alignment stable under load, giving you a tighter, more connected chassis on fast road, track day and motorsport use. If you want sharper responses, cleaner corner exits and confidence at high speed, this uprated poly bush solution delivers.

Built in Powerflex’s race-hard 95 Shore A material, these inserts occupy the voids in the factory rubber mounts to control movement of the rear crossmember. The result is improved traction, reduced flex and a more precise rear end without the hassle of a full bush replacement. We’ve run this exact setup on our own cars and customer builds, and the feedback is consistently brilliant.

Why enthusiasts choose this upgrade

• Crisper handling and rear-end stability during acceleration, braking and turn-in
• Controls rear sub-frame shift for consistent geometry and predictable balance
• Motorsport-grade polyurethane insert for durable, fade-free performance
• Ideal for track days, time attack, fast road and performance builds
• Simple insert design - targets the weak points in the OE rubber mounts

Search-friendly highlights

• BMW F30 F31 F34 rear cradle insert - performance suspension bushings
• Rear axle carrier front position insert - poly bush upgrade for F3x chassis
• High-durometer polyurethane bushing - Black Series 95A hardness
• Rear crossmember mount insert - improves traction and cornering grip
• Track-spec bush kit for BMW 3 Series Saloon F30, Touring F31, Gran Turismo F34

Fitment and technical details

• Platform: BMW 3 Series F30 - F31 - F34
• Position: Rear axle carrier - front mounting points
• Compound: Black Series 95A polyurethane
• Pack contents: 2 inserts - pair
• Part number: PFR5-1920BLK
• Replaces OE reference: 33316792509
• Diagram reference: 20

Note: Black Series is a track-focused compound. Expect firmer, more direct behaviour compared with standard rubber, with a possible increase in NVH typical of competition-grade components.

Fitting and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk. We can advise on alignment settings and complementary suspension upgrades for your build.

Buy with confidence

We use these inserts on our own cars and customer track projects - feedback has been consistently positive for grip, stability and steering precision gains. Order your Powerflex PFR5-1920BLK rear sub-frame insert kit today and give your F30 - F31 - F34 the rear-end control it deserves.