Description
Nissan S14 Silvia 200SX (95-99) BC Racing HM coilover kit 12/6 kg/mm
The BC Racing HM coilover kit S14 (part number D-14-HM) is a coilover kit adjustable in height and damping, also simply called a coilover, for the Nissan Silvia, 200SX and 240SX on the S14 platform, model years 1995 to 1999. The spring rate is 12 kg/mm front and 6 kg/mm rear.
With this kit your S14 gets a suspension that is made for serious track work. The HM series brings together the inverted dampers of the RM with the 2-way adjustment and the external reservoir of the ER.
Inverted monotube dampers are stiffer against bending forces, which matters most at high cornering speeds. The reservoir is connected via PTFE-coated, steel-braided hoses and contains a second piston, so the damping stays consistent as the temperature rises.
At 12/6 kg/mm, the spring rate is chosen on the firm side. You adjust compression and rebound each in 30 clicks, completely independently of each other.
Key benefits
- Inverted monotube dampers: front and rear, for more stiffness under lateral load.
- 2-way adjustable: compression and rebound 30 clicks each, separately.
- External reservoir with second piston: stable damping, even after several fast laps.
- PTFE-coated steel-braided hoses: durable and resistant to heat and pressure.
- Digressive damping: a flat car without the wheels losing their grip.
- Synthetic oil: keeps the damping consistent at changing temperatures.
- Spring rate 12/6 kg/mm: firmly tuned for track use.
Suitable for
Nissan 200SX, Silvia and 240SX on the S14 platform, model years 1995 to 1999
- Serious track work and high-pace track days
- Cars with more grip from semi-slicks or aerodynamics
- Drivers who want to tune compression and rebound separately
Technical specifications
- Manufacturer: BC Racing
- Part number: D-14-HM
- Series: HM, inverted, 2-way with external reservoir
- Spring rate front/rear: 12/6 kg/mm
- Damper design: inverted monotube with dual piston and external reservoir, digressive
- Damping: 2-way, 30 clicks compression and 30 clicks rebound, independent
- Ride height: infinitely adjustable via the damper body
- Top mounts: camber plates, rubber top mounts optional
- Contents: dampers and springs front and rear, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
- Warranty: 1 year on manufacturing defects. Noise from track-focused series is not covered by the warranty
Fitting and delivery
Mount the reservoirs in a place where the hoses do not rub or kink anywhere, not even with the wheel at full bump or full lock. After setting the ride height, a full wheel alignment is required, especially with these stiff springs. BC Racing advises periodic greasing of the HM series and recommends it less for road use than the BR, DS, ER or ZX. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the manufacturer is temporarily out of stock, you can still order and we will keep you informed.
The HM is what you get when you combine the stiffness of an inverted damper with the heat resistance of an external reservoir.
Why choose this HM coilover kit S14?
Because a 200SX at high pace demands a lot from its dampers. With the HM you keep the front precise on turn-in and the rear calm when accelerating out of corners, session after session. Thanks to the independent 2-way adjustment, you adjust the balance of the car without constantly having to work on the springs.
BC Racing coilover kits for the Nissan S14
Overview of the BC Racing series for the Nissan S14 supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.
| Series | Part number | Springs f/r | Damping | Intended for |
|---|---|---|---|---|
| BR | D-14-BR-RA | 6/4 | 30 clicks, linear | Road with the occasional track day |
| DS | D-14-DS-DA | 6/4 | 30 clicks, digressive | Track-focused, sporty road use |
| RM | D-14-RM-MA, inverted | 10/8 | 30 clicks, digressive, synthetic oil | Track days, hill climbs, tarmac rally |
| ER | D-14-ER, camber/caster top mounts | 10/8 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ER | D-14-ER | 9/5 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| HM (this kit) | D-14-HM | 12/6 | 2-way, 30 clicks per direction, external reservoir | Serious track use |
| ZX | D-14-ZX | 6/4 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drift |
| ZR | D-14-ZR | 10/8 | 3-way (20/12/30 clicks), external reservoir | Competitive motorsport |
Frequently asked questions
What is the difference between the BC Racing HM and ER for the Nissan S14?
The HM uses inverted dampers, like the RM, which makes the strut stiffer under lateral forces. Both are 2-way adjustable with an external reservoir. The HM coilover kit S14 is therefore the step for anyone who wants to combine the ER technology with inverted dampers.
Is the BC Racing HM coilover kit S14 with 12/6 kg/mm too hard for the road?
Yes, for the road 12/6 kg/mm is firm, because this spring rate was chosen for track use. If you are looking for a kit that is also pleasant to drive every day, look at the BR series.
What is the delivery time of this BC Racing HM coilover kit for the Nissan S14?
The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If it is temporarily sold out, you can still order and we will let you know when it is in.
Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.
EN
NL
FR
DE
Reviews
There are no reviews yet.