Dinan Anti-Roll Bar Set, xDrive – BMW M3 / M4 (G8x)

OVERVIEW

Dinan's tubular anti-roll bar set for xDrive G8x M cars is a lighter, stiffer, multi-position adjustable replacement for the factory bars, tuned around the added front-axle hardware of the all-wheel-drive cars.

Front bar steps up to 26mm from the OEM 22.5mm, and the rear to 26mm from 21.9mm, for a 16% stiffer front and 35–48% stiffer rear versus stock. The rear bar is 2-hole adjustable to dial in handling balance.

SPECS

• Front bar: 26mm (vs. 22.5mm OEM)
• Rear bar: 26mm (vs. 21.9mm OEM), 2-hole adjustable
• Stiffness increase: 16% front, 35–48% rear vs. stock
• High tensile strength alloy steel, tubular construction
• Polyurethane bushings included
• xDrive-specific — not for RWD cars (see D120-0640)

PARTS INCLUDED

• Front and rear anti-roll bars
• Polyurethane bushings
• Mounting hardware and grease

TECH RESOURCES

Additional Parts Required

• None. Dinan specifies no additional hardware for this part beyond what's included. Subframe dropping is required during install (estimated labor about 9.9 hours including alignment), so professional installation is highly recommended.

Installation

• Dinan installation instructions – D120-0645 (xDrive anti-roll bar set)

Notes

• xDrive only — confirm your drivetrain before ordering. The RWD-specific set is a separate part number, D120-0640.

PART NUMBER

• D120-0645 — Dinan Anti-Roll Bar Set, xDrive, BMW M3 / M4 (G8x)

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