Their various product lines offer superior handling, comfort, and adjustability, making them the perfect option for car enthusiasts looking to improve their ride quality. With a range of options available that cater to different driving styles, drivers are guaranteed to experience an unparalleled ride. Gas-pressure makes the difference! Bilstein B4 shock absorbers are designed to offer like for like performance with OE shock absorbers. Replacing your worn shock absorbers with Bilstein B4's will restore handling and ride comfort to your car. Shock absorbers are a wear item, and can be showing noticable signs of wear long before they would fail an MOT. Worn shock absorbers can effect cornering, braking, acceleration, and tyre life. Bilstein B4's are designed to match your cars original suspension, so they will work happily with either standard ride height springs or mild lowering springs. Up to around 30mm is normally fine, but this depends on application.