BMW M4 AC Schnitzer Wing Gurney Flap/Gurney Strip/Wicker Bill Spoiler Lip - Carbon Fibre Rear Wing Extension Aero Upgrade for Track-Day Downforce & Stability - Fits AC Schnitzer Carbon Aerofoil (Wing Not Included)

Unlock serious rear-end grip and stability for your BMW M4 with this dedicated gurney flap for the AC Schnitzer carbon rear wing. This rear aero add-on, often called a wicker bill or spoiler lip, is a proven aerodynamic aid that boosts downforce at the trailing edge of the aerofoil, delivering sharper high speed stability, improved traction out of corners and greater confidence on road and track days.

Designed specifically for the AC Schnitzer carbon rear aerofoil on the M4, this precision add-on is the smart upgrade for drivers who want more rear axle load without changing their existing wing. It is a popular choice for enthusiasts seeking motorsport-inspired performance, better balance at speed and a cleaner, more purposeful look.

• Increases rear aerodynamic load for enhanced traction and grip
• Improves high speed stability and confidence through fast sweepers
• Aids braking stability and exit speed on track-day sessions
• Motorsport-style gurney flap design for efficient pressure differential
• Neat, purposeful finish that complements the AC Schnitzer aero package

Compatibility

• For BMW M4 fitted with the AC Schnitzer carbon rear wing
• Compatible only with the AC Schnitzer carbon aerofoil for M4
• Not suitable for OEM spoilers or other aftermarket wings
• Wing not included

Why enthusiasts choose this rear aero upgrade

• Track-proven concept, ideal for performance driving and spirited road use
• Refined aero balance that helps the M4 feel planted at speed
• Excellent feedback from customers who want tangible handling gains
• Tested in-house by MJ Modifications, we rate this as a must-have pairing for the AC Schnitzer wing

Fitting and support

Professional installation recommended. MJ Modifications offers supply and fitting at our Warwickshire workshop. For a fitting quote or to book your car in, email info@mjmodifications.co.uk.

Popular search terms

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Note: images may show the AC Schnitzer carbon rear wing for illustration, the wing is not included.