H&R PCS Damper Adjustable Coilovers BMW E46 3 Series and M3

In addition to state-of-the-art inverted damper technology and adjustable ride height, PCS Coil Overs feature an external adjustment knob that allows the user to simultaneously adjust rebound and compression. Nose-diving under hard breaking is virtually eliminated, which effectively reduces braking distance. And unlike traditional twin-tube shock absorbers, H&R's mono-tube gas shock absorbers eliminate foaming of the damper oil, even under extreme conditions.

"The H&R Coilover suspension is comfortable, but it whispers fun into the driver's ear, rather than using its 'library voice' of luxury" -- European Car.

H&R Exclusive Rear Height Adjusters
H&R prides itself on its numerous 'firsts' and innovations that have revolutionized the suspension industry. One of H&R's ingenious creations is its exclusive, patented rear height adjusters. Used for height adjustment in vehicles that have a seperate rear spring / shock setup, the H&R exclusive Rear Height Adjusters in effect replace the lower rear spring perch with an easily height adjustable spring seat design. Using a hex key, a simple twist of the wrist is all that is needed to raise or lower the rear of the car. H&R's exclusive Rear Height Adjusters accompany some BMW applications.

About Coilovers
A coilover suspension basically gives you a matched lowering spring and shock absorber combination with the added benefit of adjustable ride height and spring rates through a moveable spring perch or perches. Coilovers are to your car's advantage by reducing unsprung mass, increasing suspension travel, and allowing the car to be corner balanced.