Dinan's Performance Spring set for the F30 340i (RWD) provides greater control over body roll by virtue of carefully calibrated spring rates. Additionally, Dinan lowers the 340i by a full 1" in front and 1" in the rear for improved suspension geometry and an even more aggressive stance. The 25% increase in stiffness in front and 34% increase in the rear will reduce the rear suspension compression under acceleration and front suspension compression (or dive) under braking, giving your car a more controlled feel. The Dinan performance springs will also provide a noticeable improvement in grip for high-speed driving situations that will inspire confidence in your car's capabilities. The reduced body roll makes the steering more responsive to driver input and will be noticed at speeds as low as 20 mph up to the top speed of the vehicle.

Features

• 25% increase in spring stiffness in front and 34% increase in the rear
• Compatible with both conventional and factory electronic shocks
• Vehicle lowered 1" in the front and rear
• Substantial reduction in body roll
• Preset to prevent spring sag