BC Racing HM Series Coilovers

BC Racing HM Series Coilovers come as a matched four-corner kit cut to the correct damper lengths for the car. Default spring rates are.

Because height is adjusted at the lower bracket, dropping the car does not add spring preload. You keep the full damper stroke instead of running out of travel at the bottom.

BC Racing HM Series Coilovers specification

Spring rates and what is in the box

Spring rates are matched front to rear for this application. Rates are chosen by BC Racing per application, so they suit a fast road and occasional track car as supplied. If the car is built for something more specific, a track weapon or a car carrying a lot of aero, the rates can be changed without replacing the dampers.

The kit covers all four corners and includes the dampers, springs, lower brackets, locking collars and the adjuster spanners. Anything that is worn on the car already, drop links, bushes, top mount bearings, is worth checking while the suspension is apart.

Fitting and setting up BC Racing HM Series Coilovers

Set corner heights on level ground with the driver weight accounted for, then roll the car and settle the suspension before measuring again. Ride height changes on the bracket, damping on the adjuster knob.

Middle of the range is the sensible starting point. Move a few clicks at a time and keep notes, because chasing damping settings from memory rarely ends well.

These are serviceable units. Spring rates can be swapped and the dampers rebuilt, so the kit can be re-specced as the car changes rather than replaced.

Worth reading if you are new to this: how a coilover works and why height and preload are separate adjustments.

BC Racing HM Series Coilovers questions

Will BC Racing HM Series Coilovers fit without modification?

The kit is cut to the BC Racing HM Series Coilovers damper and strut dimensions and uses the standard mounting points. No cutting or welding is needed for a standard car.

How low will the BC Racing HM Series Coilovers go on these?

Height is adjustable across the full range of the lower bracket. How low you can usefully run depends on your wheel and tyre size and how the car is used, so set it to suit how the car is actually used.

What spring rates do BC Racing HM Series Coilovers come with?

as standard. The springs are a standard ID, so rates can be changed later without replacing the dampers.

Do I need an alignment afterwards?

Yes. Camber and toe both move as the car comes down, so book the alignment once the ride height is set and the suspension has settled.

Are these road legal?

Adjustable suspension is legal for road use in the UK. Keep the ride height sensible, make sure nothing fouls at full lock or full compression, and tell your insurer the car has been modified.

If you are not sure which configuration suits your car, send us the registration and what the car is used for and we will confirm the right BC Racing HM Series Coilovers spec before you order.

More from this range: BC Racing coilovers. Other kits: BC Racing ZR Series Coilovers, BC Racing ZX Series Coilovers, BC Racing ER Series Coilovers.