Powerflex Black Series Front Lower Control Arm Rear Bushes for BMW 1 Series F20 F21 - Tension Strut to Body/Chassis / Radius Rod/Arm / Wishbone Lollipop Polyurethane Bushes - Track & Fast Road - Pair - Replaces 31126855743 31126855741 31126855742

Serious about lap times and steering feel on your BMW 1 Series F20 and F21? Swap the soft factory rubber for these track-focused polyurethane tension strut to body bushes and experience laser-sharp turn-in, rock-solid braking stability, and repeatable handling. Built from the Black 95 Shore A compound and designed for motorsport, they control arm movement under high load so your alignment stays where you set it.

Over 200% stiffer than the standard items, this uprated bush kit keeps caster and toe consistent when you lean on the car, giving you confidence on fast road, track day, and competition use. We have fitted these on our own cars and our customers consistently report tighter front-end response and far more predictable grip at the limit.

Why this upgrade

• Motorsport-grade polyurethane resists deflection for ultra-precise steering
• Keeps geometry stable under hard braking and cornering for consistent feedback
• Direct replacement design for the front lower arm mount at the body
• Durable construction that stands up to repeated heat cycles and heavy use
• Ideal for fast road, track day, time attack, and club racing builds

Fitment

BMW 1 Series F20 and F21
Position: front lower arm rear mount at the chassis body pick-up point

Technical details

• Compound: Black 95 Shore A
• Pack contents: 2 bushes - sold as a pair
• Diagram reference: 1
• Replaces BMW OE numbers: 31126855743, 31126855741, 31126855742
• Caster offset option available: PFF5-1901GBLK

What you will feel

• Sharper initial turn-in and more direct steering
• Improved stability on the brakes and through high-speed direction changes
• Reduced arm movement that keeps alignment true for repeatable performance

Professional fitting

Prefer expert installation and a geometry setup to match? MJ Modifications in Warwickshire can take care of it. Request a fitting quote at info@mjmodifications.co.uk.

Search-friendly terms

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Ready to transform how your F20 or F21 drives on circuit and fast road? Add to basket and let these motorsport bushings unlock the front-end control your build deserves.