Powerflex Black Series Track Shift Arm Front Bush Inserts (Oval) for BMW 1 Series F20 F21 2011-2019 - 95A Polyurethane Pair - Replaces OEM 33316792510

Sharper steering feel and rock-solid geometry for BMW 1 Series F20 F21

If you want crisper turn-in, cleaner feedback and repeatable lap-after-lap stability, these race-focused polyurethane insert bushes are the upgrade your BMW F20 or F21 has been waiting for. Built in the firm 95 Shore A compound, the oval-profile inserts limit compliance in the factory rubber mount to keep the arm located under hard braking and high lateral load. The result is a more planted front end, better stability through rapid direction changes and a more confidence-inspiring drive on fast road and circuit.

We run this setup on our own builds and customers love the transformation: reduced deflection, improved accuracy and dependable performance that stays consistent even when hot. A simple, high-impact chassis mod that punches well above its weight.

Key advantages

• Enhanced steering precision and front-end bite during hard cornering
• Minimised arm movement for more stable camber and toe control
• Durable motorsport-grade polyurethane that resists heat and wear
• Ideal for track days, time attack, hillclimb and fast-road builds
• Insert design retains the OE housing while cutting unwanted compliance

Product details

• Vehicle compatibility: BMW 1 Series F20 and F21 - 2011 to 2019
• Material: 95 Shore A performance polyurethane
• Profile: Oval insert for the original rubber mount
• Pack contents: Pair of front arm insert bushes
• Diagram reference: 21
• OE cross-reference: 33316792510
• Intended use: Track, competition and aggressive road driving

Note: This is an insert that fits into the voids of the standard bush to curtail movement, helping to maintain chassis alignment under load for a more direct response.

Fitting and support

Professional installation recommended. For expert fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Why enthusiasts choose this upgrade

• Stronger on-centre feel and improved braking stability
• More predictable behaviour over kerbs and through rapid transitions
• Consistent performance versus ageing factory rubber

Search-friendly terms

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