Bilstein B4 12-13 BMW 320i/328i/335i Rear Twintube Strut Assembly Drivetrain>Clutch Covers When combined with an Axle-Back

When combined with an Axle-Back system it creates a Cat-Back(tm) System

unimpeded airflow it needs to make up to 15 more horsepower and 21 ft/lbs more torque

Joint articulation was designed to exceed factory range which prevents binding during operation

Pilot Bushing: Where applicable

preventing potential damage to other essential engine components

Bilstein B4 12-13 BMW 320i/328i/335i Rear Twintube Strut Assembly Drivetrain>Clutch Covers When combined with an Axle-BackBilstein B4 OE Replacement dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. These dampers are the ideal choice for the driver looking to restore the original performance and handling of their vehicle, with the added benefit of world famous Bilstein quality.