Product Details
BC Racing BR Series Coilovers for the 1990-2005 Mazda Miata (NA8C) are BC Racing's entry-level coilover and the most popular kit in their entire lineup — they offer the most accessible entry into adjustable coilover suspension without sacrificing performance, comfort, build quality, or handling. Every kit is extensively tested on the NA8C chassis and refined until it balances ride quality with performance — the reason Miata coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.
Every BR Series kit is built around a mono-tube damper with simultaneous compression and rebound adjustment at every corner — a wide damping range without the complexity of a race-only setup. Ride height is fully adjustable independent of spring preload, so you set the stance and the ride separately. BC Racing takes pride in choosing spring rates and damper valving that balance comfort and performance — you never end up with the oversprung, harsh-riding kit some brands ship as their only option. Drivers who want to deviate from the factory setup can order Swift Springs, custom spring rates, and custom valving at checkout; BC will re-valve the dampers to match whatever you specify, a level of customization most brands reserve for their top-tier race kits.
Since 2004, BC Racing has grown into one of the most trusted names in aftermarket coilovers — not by racing to the bottom on price, but by pairing that price with real build quality, deep customization options, and a damper design any suspension shop can rebuild instead of replacing. These Miata coilovers arrive tuned for the NA8C chassis and ready to bolt in — no break-in period, no guessing at setup. Every kit ships with a 2-year manufacturer warranty, lifetime access to BC service parts (pistons, seals, shafts — no unit replacement required when it's time for a rebuild), and in-house tech support from both BC Racing and the Springrates team.
Features
- 30-level simultaneous compression/rebound damping adjuster
- Mono-tube damper with linear piston and hardened chrome shaft
- Ride height adjustable independent of spring preload
- Upper mount hardware varies by chassis — camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.
- Swift Spring and custom spring rate upgrades available at checkout
- Custom damper valving paired with custom spring rates on request
- Fully rebuildable — replacement parts available from BC for the life of the shock
- 2-year manufacturer warranty against defects
Specifications
| Part Number | N-04-BR |
| Part Name | BR Series Coilovers |
| Vehicle | 1990-2005 Mazda Miata |
| Drivetrain | RWD |
| Chassis Code | NA8C |
| Damping Adjustment | 1-Way (30 levels) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 10 kg/mm |
| Spring Rate - Rear | 8 kg/mm |
| Spring Size - Front | 62-150-10K |
| Spring Size - Rear | 62-150-8K |
| Swift Springs - Front | 62-152-X |
| Swift Springs - Rear | 62-152-X |
| Camber Plates - Front | Not Applicable |
| Camber Plates - Rear | Not Applicable |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | True Coilover |
| Notes | Extreme low only |
Vehicle Fitment
- 1990 Mazda Miata RWD (NA8C)
- 1991 Mazda Miata RWD (NA8C)
- 1992 Mazda Miata RWD (NA8C)
- 1993 Mazda Miata RWD (NA8C)
- 1994 Mazda Miata RWD (NA8C)
- 1995 Mazda Miata RWD (NA8C)
- 1996 Mazda Miata RWD (NA8C)
- 1997 Mazda Miata RWD (NA8C)
- 1998 Mazda Miata RWD (NA8C)
- 1999 Mazda Miata RWD (NA8C)
- 2000 Mazda Miata RWD (NA8C)
- 2001 Mazda Miata RWD (NA8C)
- 2002 Mazda Miata RWD (NA8C)
- 2003 Mazda Miata RWD (NA8C)
- 2004 Mazda Miata RWD (NA8C)
- 2005 Mazda Miata RWD (NA8C)