Dinan Performance Coil Spring Set for 2019-2026 BMW 330i, M340i & M440i xDrive (D100-0934)

Fits select 2019-2026 BMW 330i, 330i xDrive, M340i, M340i xDrive, and 2021-2026 M440i xDrive models.

The Dinan Performance Spring Set (D100-0934) is engineered to enhance the handling characteristics of the G20 and G22 chassis without compromising ride quality. By optimizing spring rates and lowering the center of gravity, these springs significantly reduce body roll and improve suspension geometry. Each spring is CNC wound from high-tensile chrome silicon wire and shot-peened to relieve internal stress, ensuring they maintain their height and performance for the life of the vehicle.

Whether your BMW is equipped with conventional or factory electronic shocks, these springs integrate seamlessly to provide a more responsive steering feel. The increased stiffness minimizes front-end dive under heavy braking and rear-end squat during acceleration, resulting in a more stable and predictable platform during high-speed maneuvers.

• CNC wound high-tensile chrome silicon wire for maximum durability
• Shot-peened for stress relief and preset to prevent future sag
• Compatible with factory electronic and conventional shock absorbers
• Lowering (330i RWD): 1-1/8" front, 3/4" rear
• Lowering (330i xDrive): 5/8" front, 3/4" rear
• Lowering (M340i RWD & xDrive): 1" front and rear
• Lowering (M440i xDrive): 1-1/8" front, 5/8" rear
• Stiffness Increase (M340i RWD): 15% front and rear
• Stiffness Increase (M440i xDrive): 23% rear
• Manufacturer Part Number: D100-0934