Eibach E40-72-004-01-01 Rear Anti-Roll Bar Kit for 1997-2012 Porsche Boxster

Vehicle Fitment

• 1997-2012 Porsche Boxster (986 / 987) - Rear axle
• 2006-2012 Porsche Cayman (987) - Rear axle

Features

• Rear-axle anti-roll (sway) bar kit from Eibach
• Cold-formed, high-strength steel construction - no welds for maximum integrity
• Tubular sway-bar design for high stiffness with minimized weight
• Reduces body roll and improves stability during cornering and spirited driving
• Sharper, more precise turn-in and more predictable handling at speed
• Compatible with stock suspension and common aftermarket setups including springs or lowered ride height
• Completely includes bushings and mounting hardware - ready for install
• Ideal for street, performance driving, or occasional track use

Specifications

• Part Number: E40-72-004-01-01
• Application: Rear axle anti-roll (sway) bar only
• Sway Bar Profile: Tubular
• Bar Diameter / Stiffness: 22 mm (rear)
• Adjustability: Fixed rear bar (non-adjustable mounting position - optimized for balanced handling)
• Material: High-strength forged / cold-formed steel
• Finish: Powder-coated / corrosion-resistant finish
• Included Components: 1x Rear sway bar, bushings, mounting hardware and end-links
• Intended Use: Improved handling/stability for Porsche Boxster (1997-2012) & Cayman (2006-2012)

Included Components

• 1x Rear tub-style anti-roll sway bar
• 2x Urethane bushings & mounting brackets
• All required mounting hardware / end-links

Product Description

The Eibach E40-72-004-01-01 Rear Anti-Roll Bar Kit is engineered specifically for Porsche Boxster (1997-2012) and Cayman (2006-2012) models, delivering a significant handling upgrade over stock suspension. By replacing the factory rear stabilizer bar with a 22 mm high-strength tubular unit, this kit reduces body roll, improves chassis stability, and sharpens turn-in - giving you a more controlled and precise driving experience whether you're navigating tight corners on the street or pushing the car on a track day.

Constructed from forged, cold-formed steel and finished with a corrosion-resistant coating, the sway bar is built for longevity and performance. Installation includes new bushings, mounting hardware, and end-links for a direct bolt-on setup, and the kit is compatible with both stock and lowered-suspension configurations. The result is firmer, flatter cornering, reduced understeer/oversteer tendencies, and a more neutral, balanced feel under lateral loads - all without sacrificing ride comfort or daily drivability.

Whether you're tuning your Boxster/Cayman for spirited canyon runs, improving everyday driving dynamics, or prepping for occasional track outings, the E40-72-004-01-01 anti-roll bar is a reliable, effective upgrade. Note: After installation, always check wheel alignment and suspension geometry to ensure optimal handling and tire wear.