H&R 72878-2 Sport Sway Bar Kit 28 mm Front/20 mm Rear for 2012-2020 BMW F-Series

Vehicle Fitment

• 2012-2015 BMW 335i (F30 / F31 / F34, N55 3.0L)
• 2014-2016 BMW 435i (F32 / F33 / F36, N55 3.0L)
• 2015-2016 BMW 435i Gran Coupe (F36, N55 3.0L)
• 2017-2020 BMW 440i (F32 / F33 / F36, B58 3.0L)
• 2017-2020 BMW 440i Gran Coupe (F36, B58 3.0L)
• 2014-2016 BMW M235i (F22, N55 3.0L)
• 2017-2020 BMW M240i (F22, B58 3.0L)

Features

• Front sway bar: 28 mm diameter - significantly increases roll stiffness and reduces body roll.
• Rear sway bar: 20 mm diameter - improves rear stability while maintaining ride comfort.
• Front bar is 2-way adjustable - allows tuning stiffness based on driving style or road conditions.
• Bars constructed from high-tensile 50CrV4 steel alloy - strong, durable and long-lasting under stress.
• Cold-formed, heat-treated and shot-peened bars - ensures structural integrity and fatigue resistance.
• Machined / forged seamless bar ends - precise fitment and smooth installation using stock mounting points.
• Includes proprietary urethane/Teflon composite bushings - reduced noise, maintenance-free, no lubrication required.
• Maintains OEM-like ride quality while improving handling - ideal for spirited street driving or occasional track use.

Specifications

• Front bar diameter: 28 mm (≈ 1.10")
• Rear bar diameter: 20 mm (≈ 0.79")
• Front bar adjustability: 2-way adjustable
• Rear bar adjustability: fixed (non-adjustable)
• Material: HF 50CrV4 steel alloy, cold-formed, heat treated, shot-peened
• Bushings: Urethane / Teflon composite (maintenance-free)

Included Components

• 1x Front sway bar (28 mm, adjustable)
• 1x Rear sway bar (20 mm, fixed)
• 1x Set of urethane/Teflon composite bushings
• 1x Installation hardware kit (mount brackets, end-links, bolts/nuts as required for listed BMW F-series fitment)

Product Description

The H&R 72878-2 Sport Sway Bar Kit is a matched front-and-rear upgrade engineered for BMW F-series 2/3/4-Series (including 335i, 435i, 440i, M235i, M240i) to dramatically improve handling dynamics without sacrificing comfort. By replacing the stock sway bars with a stout 28 mm front and 20 mm rear setup, the kit dramatically increases roll stiffness, reduces body roll in turns, and enhances lateral stability - giving your BMW a more planted, controlled feel during cornering and spirited driving.

Constructed from high-tensile 50CrV4 alloy and carefully cold-formed, heat-treated and shot-peened for maximum durability, the 72878-2 bars are built to withstand high loads while maintaining structural integrity over time. The front bar's 2-way adjustability allows tuning to match your driving style or track/street conditions. Poly-Teflon bushings eliminate squeaks and maintenance, while the bolt-on design uses factory mounting points for straightforward installation. This makes the 72878-2 kit ideal for enthusiasts seeking improved handling on street or track - with no major suspension modifications required.