BC Racing Coilovers

BC Racing's current lineup runs from the ASP adjustable perch system up through BR, DS, RM, ER, HM, ZR, and ZX, with each step up adding damping channels, reservoirs, or race-specific hardware. The coilovers hub breaks down how coilovers differ from springs and struts if you're still deciding whether a full kit is worth it.

BC Racing builds application-specific kits for a wide range of chassis, including Honda Civic, Subaru WRX/STI, Nissan 350Z/G35 and 370Z/G37, Infiniti Q50, BMW E36 and E46 3-Series, and the Mazda Miata/MX-5, each with spring rates and shock lengths matched to that car. See our 350Z/G35 coilover page and 370Z/G37 coilover page for platform-specific notes.

The BR Series is BC Racing's entry point: a mono-tube shock with a linear piston and damping curve, adjusted through 30 clicks that move compression and rebound together rather than independently. Ride height is set at the shock body, independent of spring preload, so lowering the car doesn't also stiffen or soften the spring. Front camber plates come standard on applicable kits, with rear camber plates available, and BC Racing backs the series with a warranty against manufacturer defects. The term differs between sources (1 year on BC Racing's BR Series page, 2 years in its online store listings in October 2026), so confirm it with the seller when you order.

BC Racing positions BR as an affordable way into coilover suspension without giving up build quality or handling, which is why it's the kit most people mean when they search for a bc racing coilover or bc coilover without naming a series.

Every step above BR trades simplicity for more independent control over compression and rebound. The table below compares the main series by damping adjustment and intended use.

BC Racing also sells an Extreme Low build of the BR kit for owners chasing a lower stance than the standard kit allows, using a shorter shock and spring package on applicable platforms. How much extra drop you get depends entirely on the chassis, so check the fitment notes for your specific car before ordering.

On the 2003-2008 Nissan 350Z (Z33), for example, the standard BR kit drops the car roughly 1-2 inches below factory ride height, with front and rear spring rates around 9 kg/mm and 8 kg/mm, per BC Racing's published fitment data; the Extreme Low version goes lower still, and factory ride height can't be restored on this platform once the kit is installed.

Every BR Series shock is fully rebuildable, and BC Racing sells individual components separately rather than forcing a full kit replacement when one part wears out. That covers a worn shock, a leaking seal, or a spring rate change without buying a whole new kit.

If you're shopping a used set, ask the seller for the original spring rates and whether any parts have already been rebuilt or swapped, since a mismatched rebuild is the most common reason a used BC Racing kit rides differently than a new one.

BC Racing sits in the same budget-adjustable bracket as brands like D2 Racing, Megan Racing, and Ksport. All four build multi-way adjustable, application-specific kits aimed at import and sport-compact platforms at a price well under premium German and Japanese brands.

Where BC Racing tends to stand out is parts support: standard front camber plates on applicable kits, a factory option for Swift Springs, and a full lineup of rebuildable individual components. Which of the four rides best on your car comes down to the specific spring rate and valving on your platform more than the brand name, so compare the actual kit specs rather than assuming one brand is universally stiffer or softer.

Ride height on a BC Racing coilover adjusts independently of spring preload, so you can lower or raise the car without changing how much the spring is compressed, which keeps your corner weights closer to where they started. The BR Series damping dial gives 30 clicks across compression and rebound together; turning it doesn't change ride height, so you can tune ride quality after the car is already at your target drop.

Our coilover adjustment guide and installation and cost guide cover the general process and typical shop labor if you're not installing it yourself.