Description

RSS Performance Sway Bar for BMW 4 GRAN COUPE (G26) 420i

Upgrade your BMW 4 GRAN COUPE (G26) 420i with the RSS Performance Sway Bar. Manufactured from aerospace-grade high-strength steel, this sway bar significantly reduces body roll and improves cornering grip.

Technical Specifications

Vehicle	BMW 4 GRAN COUPE (G26) 420i
Year	07.20 –
Adjustment Positions	Front 1 gears，Rear 1 gears
Bar Diameter	Front 28 MM，Rear 19 MM
Material	Aerospace-Grade High-Strength Steel
Finish	Blue Powder Coat (Corrosion Resistant)

Key Features

• Aerospace-Grade Steel: Higher strength and toughness than OEM for maximum lateral support.
• Blue Powder-Coated Finish: Corrosion resistant for long-term durability.
• Adjustable Stiffness: Front 1 gears，Rear 1 gears – tune your preferred balance of grip vs comfort.
• Optimized Diameter: Front 28 MM，Rear 19 MM for the ideal balance of stiffness and compliance.
• Reduced Body Roll: Noticeably flatter cornering and lane-change stability.
• Improved Steering Response: Sharper turn-in and more predictable handling.
• RSS Coilover Compatible: Developed alongside RSS HAD coilovers for a perfectly matched suspension package.

Compatible BMW 4 GRAN COUPE (G26) Models

Model	Year	Available RSS Products
420i	07.20 –	HAD Coilovers, Performance Sway Bar
430i	07.20 –	HAD Coilovers, Performance Sway Bar
430i xDrive	07.20 –	HAD Coilovers, Performance Sway Bar

Complete your BMW 4 GRAN COUPE (G26) suspension upgrade: RSS also offers HAD Coilovers for this platform. Pair your products for the ultimate handling package.

Frequently Asked Questions

What does a performance sway bar do?

A sway bar (anti-roll bar) connects opposite wheels through a torsion spring, limiting body roll during cornering. A stiffer aftermarket bar dramatically improves handling without compromising ride quality.

How do the adjustment positions work?

The Front 1 gears，Rear 1 gears settings let you fine-tune the front-rear roll balance. More stiffness at the front reduces understeer; more at the rear adds rotation.

Can I install this with stock suspension?

Yes, the RSS Performance Sway Bar works with both stock suspension and aftermarket coilovers. For maximum benefit, pair it with RSS HAD Coilovers.

Is professional installation required?

Installation is straightforward with basic tools, though professional fitting ensures optimal bushing alignment and torque specs.

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