Dinan Performance Spring Set for BMW 330i / M340i / M440i (xDrive) 2019-2026

Note: Not compatible with the M440i RWD.

Achieve the perfect balance of aggressive stance, refined ride quality, and sharpened handling with the Dinan Performance Spring Set for the G20 M340i, G22 M440i xDrive, and 330i models. Engineered with model-specific lowering heights and precisely calibrated spring rates, this system reduces body roll, dive, and squat for a more controlled and responsive driving experience. For optimal performance and to maintain warranty coverage, this spring set must be installed with the corresponding Dinan Supplemental Ride Quality and Handling Kit.

Key Benefits:

• Enhanced Handling & Control: Model-specific spring rates deliver a substantial reduction in body roll for sharper cornering, reduced brake dive, and minimized acceleration squat.

• Aggressive, Optimized Stance: Lowers the vehicle with model-specific geometry to improve suspension dynamics and visual appeal.

• Preserved Ride Quality: When paired with the required Supplemental Handling Kit, the system maintains suspension travel and daily-driving comfort.

• Broad Compatibility: Designed to work seamlessly with both conventional factory shocks and factory electronic (EDC) shock systems.

Detailed Features & Specifications:

• Model-Specific Lowering (Front/Rear):

  • M340i (RWD & xDrive): 1.0" / 1.0"

  • M440i (xDrive): 1.125" / 0.625"

  • 330i (xDrive): 0.625" / 0.75"

  • 330i (RWD): 1.125" / 0.75"

• Model-Specific Spring Rate Increases:

  • M340i (RWD): 15% Front & Rear

  • M340i (xDrive): Negligible Front / 10% Rear

  • M440i (xDrive): Negligible Front / 23% Rear

  • 330i: 7-95% Front / 34-92% Rear (varies by stock configuration)

• Required Companion Part: The Dinan Supplemental Ride Quality and Handling Kit is required for proper operation, advertised ride height, and to maintain product warranty coverage.

• Construction: CNC-wound, shot-peened, and preset to prevent sag for lifelong durability and consistent performance.