Ultra Racing RL4-3465 Rear Lower Tie Bar for BMW 1 Series F20 – Rear Chassis/Subframe Brace, Lower Control Arm Brace, Underbody Reinforcement Handling Upgrade

Rear Chassis Tie Bar for BMW 1 Series F20 by Ultra Racing

Unlock sharper response, flatter cornering and greater confidence on B-roads and track days with this rear underbody reinforcement bar for the BMW 1 Series F20 platform. Engineered to stiffen the back end of the car, it links key mounting points to reduce flex, tighten up the rear subframe area and deliver more predictable handling. Part No: RL4-3465.

Built from lightweight carbon steel and finished in Ultra Racing’s signature pure solid white, this upgrade increases chassis rigidity significantly. Expect crisper turn-in, better rear-end composure through fast sweepers and more consistent braking stability. Independent feedback regularly reports a noticeable uplift in control, with many users citing a transformation in balance and steering precision.

Why enthusiasts choose this F20 handling upgrade

• Significant increase in torsional stiffness for the F20 chassis
• Helps the car sit flatter mid-corner for improved grip and balance
• More neutral cornering attitude with reduced push at the limit
• Enhanced braking stability and straighter stops on uneven surfaces
• Calmer, more composed rear axle over bumps and during hard transitions
• Smoother, more precise steering feel and driver confidence

Materials and finish

• Lightweight carbon steel construction for strength without unnecessary weight
• Durable pure solid white coating that looks smart and resists corrosion

Brand overview

Ultra Racing has specialised in chassis bracing since 2002 and is trusted worldwide for proven suspension reinforcement solutions, including strut bars, subframe braces, anti-roll upgrades and fender bars. Their focus on rigidity and safety has made them a go-to choice for drivers seeking real-world handling gains.

Real-world results

We have fitted this upgrade for numerous customers and the feedback is consistently positive. Owners report firmer turn-in, cleaner exits and an overall boost in confidence when pressing on. It is a simple, high-impact modification for fast road and track use on the F20 platform.

Warranty

Lifetime limited warranty against manufacturing defects from Ultra Racing.

Professional fitting

Want it installed properly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Search-friendly terms customers use

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