The G20 and G22 are great daily drivers straight from the factory. But look at one from the side and you see the wheel gap, and push one through a highway on-ramp and you feel the extra roll and squat. You want it tighter and lower without turning your commute into a punishment.
The Dinan Performance Spring Set does it the right way: one spring set for the BMW G20 330i, G20 M340i and G22 M440i xDrive, with rates and drops engineered separately for each model and drivetrain. No generic one-size drop. Each car gets the spring its weight and layout actually need.
Why the Dinan Performance Spring Set Is Tuned Per Model
A 330i with a four-cylinder and an M340i xDrive with a six and all-wheel drive sit very differently on their stock springs. Dinan set the drop and rate for each one. That means a firmer, flatter car with less squat on launch and less dive under braking, scaled to what your model started with, not a harsh, over-sprung ride.
Every spring is CNC wound from high-tensile chrome silicon wire, shot-peened for stress relief, and preset so it will not sag over time. They work with both conventional shocks and BMW's factory electronic adaptive shocks, so M Sport adaptive cars keep full drive mode control.
Dinan Performance Spring Set Specs by Model
- 330i RWD: 1-1/8" lower front, 3/4" lower rear. 7-95% stiffer front, 34-92% stiffer rear
- 330i xDrive: 5/8" lower front, 3/4" lower rear. 7-95% stiffer front, 34-92% stiffer rear
- M340i RWD: 1" lower front and rear. 15% stiffer front and rear
- M340i xDrive: 1" lower front and rear. Front rate essentially unchanged, 10% stiffer rear
- M440i xDrive: 1-1/8" lower front, 5/8" lower rear. Front rate essentially unchanged, 23% stiffer rear
For the best ride at the lower height, pair these springs with the Dinan Supplemental Ride Quality and Handling Kit, sold separately. Dinan's ride and handling warranty coverage assumes that kit is installed. Dinan part number D100-0934. Sold by AutoTecknic, an authorized Dinan dealer.
What's Included
- Front and rear Dinan performance springs for your specific model and drivetrain
Key Features
- Drop and spring rate engineered separately for each model and drivetrain
- Up to 1-1/8" lower depending on model
- Less body roll, rear squat and front dive
- CNC wound high-tensile chrome silicon wire, shot-peened for stress relief
- Preset to prevent sagging
- Compatible with conventional and factory electronic adaptive shocks
Vehicle Fitment
Fits the following BMW models:
- BMW 330i / G20 Sedan (2019-2026): RWD and xDrive
- BMW M340i / G20 Sedan (2020-2026): RWD and xDrive
- BMW M440i xDrive / G22 Coupe (2021-2026): xDrive only
Does not fit the M440i RWD, 330e, 430i, 4 Series Convertible (G23) or 4 Series Gran Coupe (G26).
Installation Notes
Dinan quotes 8.4 hours of labor. This job needs a lift and a spring compressor, so professional installation is recommended. A four-wheel alignment is required after lowering.
- Raise and support the car and remove the wheels.
- Remove the front strut assemblies, compress the springs, and swap in the Dinan front springs on the factory struts.
- Unload the rear suspension and replace the rear springs with the Dinan rear springs.
- Reinstall everything, torque to factory spec, and let the suspension settle.
- Complete a four-wheel alignment at the new ride height.
