Bilstein B14 (PSS) Front & Rear Performance Suspension Kit BMW 228i, 235i, 320i, 328i, 335i, 428i, 435i, M235i

Utilizing Bilstein's monotube shock absorber design for heat dissipation and ride control, the B14 (PSS) Coil-Over System adds a matched performance spring and threaded ride height adjuster to provide a complete suspension system for your BMW 228i, 235i, 320i, 328i, 335i, 428i, 435i, M235i.

The Bilstein B14 (PSS) Coil-Over System allows you to adjust your vehicle's ride height only. Set your vehicle low and tight for optimized performance or revert to a more stock-like ride height and handling characteristics.

This system features both coil-over and standard monotube gas pressure shocks with performance level valving along with application specific, progressive rate coil springs. Ride height adjustments can be made on the vehicle without removing the suspension. The solid aluminum spring seat and lock nut allow a selective adjustment of the vehicle's ride height. Spring travel and vehicle body height change, but the spring seat remains pre-loaded throughout the allowable range of adjustment.

About the Bilstein Shocks Included in this System

All Bilstein gas pressure struts/inserts and gas pressure shock absorbers operate on the same principle. They are manufactured with the rod pointing down into the strut tube, thereby utilizing the thicker, stouter body portion of the shock absorber to dissipate side loads. Consequently, due to the increased diameter and surface of the pressure tube, the Bilstein gas pressure strut/insert or shock is better suited to take increased side loads when compared with the conventional version.

Additional advantages, based on development strongly influenced by the motorsport industry, include greater stability, better road handling, and accurate steering. This combined with extremely high quality manufacturing and materials, means Bilsteins will last approximately four times as long as Original Equipment.

Battling Heat Build Up

Conventional shocks trap the heat within the shock body and prevent adequate dissipation, making them prone to heat build up, fade and eventual failure.

Bilstein's patented design allows the excessive heat from the oil to transfer to the outer surface of the shock body and dissipate more efficiently. The dividing piston also permits the oil to expand as heat builds, preventing aeration (foaming) and viscosity loss. This allows the shock to maintain full damping characteristics as temperatures rise.

The tube of a Bilstein gas pressure shock or strut is fabricated using a special extrusion method. This process achieves an extremely tight peak-to-valley tolerance and maintains consistent wall thickness. Bilstein's seamless monotube design provides superior tube strength while maximizing heat dissipation and shock life.

Ride Comfort and Performance Without Compromise

The piston head design allows independent tuning of the compression and rebound damping forces to provide optimum ride comfort and performance without compromise. It features fewer parts than most conventional designs. The product's simple, yet exceptionally functional digressive design contributes to the extreme durability and long life of Bilstein Shock Absorbers.

Better Built

Bilstein's shock bodies are precision formed through a unique seamless extrusion process. This provides superior strength along with high finish tolerances. The shock body is then treated with a special paint finish durable enough to withstand grueling 240-hour salt spray tests. The finished body is mated with a solid, induction-hardened steel chrome plated and polished shaft, machined valving components and highest quality seals.

Bilstein products are backed by an aftermarket lifetime warranty.

Applications- BMW 228i 2016-2014, 230i 2021-2017, 320i 2018-2013, 328d 2018-2014, 328i 2016-2012, 330e 2018-2016, 330i 2018-2017, 335i 2015-2012, 340i 2018-2016, 428i 2016-2014, 428i Gran Coupe 2016-2015, 430i 2020-2017, 430i Gran Coupe 2020-2017, 435i 2016-2014, 435i Gran Coupe 2016-2015, 440i 2020-2017, 440i Gran Coupe 2020-2017, ActiveHybrid 3 2015-2013