Differences Between BC Racing Coilovers (Updated For 2025 Lineup)
April 22, 2025
If you know BC Racing, you know they have what seems like a million different coilover series (that may be a bit of a stretch, but even seven series are hard to keep track of). They all range from different adjustability scales, budgets, and applications, but they’re all backed by BC’s excellent build quality and reliability.
After all, not every coilover company has their own legit racing team all the way from Time Attack, Grid Lift, Formula Drift, and Formula Drift Pro —this includes one of the enthusiast community’s favorite car dudes, Adam LZ (Formula Drift Pro).
Regardless, BC Racing has seven super badass coilover series that have all built a name for themselves in the enthusiast community, and one more that is coming soon for entry to the market in 2025. Let's take a dive into the BC Racing lineup and see what it's got going on!
In this complete BC Racing coilover guide, we’re going to break down every series that they currently offer in hopes to help you figure out which series is best for your application.
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BC Racing Coilovers Guide
BC Racing BR Series Coilovers
The BR Series from BC Racing is the most budget-friendly and popular coilover series, and it’s easy to see why.
It's arguably the best choice for budget-friendly, street builds that partake in the occasional road course or autocross duty because it still has all the adjustments you need for an exciting driving experience with the BC Racing label.
Photo from BC Racing
The BR series features 30-clicks of simultaneous compression and rebound adjustments allowing drivers to easily adjust damping for their application.
Let's say you're just cruising to work during the week—you can adjust the BR series to ride easily and smoothly.
Once you're at the track, you can stiffen those bad boys up in practically 3 seconds.
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The ride height adjustment on the BR series is actually independent of shock stroke and spring preload which is ideal since it allows the spring preload to be snug regardless of the ride height you choose.
Drivers can choose how low or high the vehicle sits (no manufacturer preset ride height here!) and a BC Racing patented concave lower locking ring keeps it locked securely in place.
Most systems can be upgraded to pillow ball mounts and swift springs to provide a lil extra feedback from the suspension to sharpen steering response.
This makes a world of difference into the corners.
And for those who want camber adjustments on their coilovers, the BR series from BC Racing also features front camber plates which are crazy easy to adjust (as shown above).
Now, if you were hoping to have some nasty camber, these camber adjustment plates (alone) are not going to make your tilty-boy dreams come true—or any coilover really.
If that’s that look you’re going for, you’ll have to invest in some more suspension upgrades.
Regardless, the BR series has everything entry-level and daily drivers need on the street and for the occasional track day.
BR Series Overview:
- Ideal for daily drivers and the occasional track/autocross day
- Mono-tube shock design
- Ride height adjustment independent of spring preload
- 30-Clicks of simultaneous compression and rebound adjustment (damping)
- Front adjustable camber plates
- Custom spring rates and swift spring upgrades available
- Fully rebuildable
- Starting at $930
BC Racing RM Series Coilovers
The RM Series from BC Racing shares many of the same features as the BR Series like the adjustable ride height and damping, however, there’s one major difference.
The RM Series coilovers feature an inverted monotube damper.
In simple terms, this configuration moves the damper fluid away from the heat of your braking system.
As we all know, heat build-up can have detrimental effects on literally anything on your car; hence why manufacturers have heat shields and such.
This inverted monotube damper allows the fluid inside the coilover to stay cool and provide better cornering and stability as a result.
Additionally, the RM series uses a significantly larger inverted piston shaft designed to handle more abuse from track days for longer periods of time without fatigue.
As you might have guessed, the RM Series is designed primarily for track applications, so it's probably best to throw these on your weekend race car.
RM Series Overview:
- Designed for track applications
- Inverted mono-tube damper for better fluid cooling
- Ride height adjustment independent of spring preload
- 30-Clicks of simultaneous compression and rebound adjustment (damping)
- Front camber plates
- Rear camber plates available for application kits
- Custom spring rates and swift spring upgrades available
- Fully rebuildable
BC Racing DS (DR) Series Coilovers
The DS Series was previously known as the DR Series so this will apply to both.
The DS series coilovers have what's called a Digressive Piston, which allows the coilovers to make adjustments based on speed and road conditions.
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During high speeds, the coilovers stiffen to reduce body roll when you're taking a fast corner, but they will also soften when you encounter things like a pothole or poor road conditions to soften the ride.
Now, if you live somewhere with terrible roads and potholes literally everywhere—*cough cough* Wisconsin—then this is a nice feature for you.
The DS series also provides more travel at low speeds allowing the driver to essentially “roll” into corners.
This series is perfect for your autocross or track day car that may sometimes encounter some bumpy surfaces.
They allow great performance at any speed and the adaptation means that there is less of a chance of upsetting the car during cornering or acceleration.
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We notice that a lot of enthusiasts bounce between the BR series and the DS series.
If this is you, ask yourself what your car’s purpose is.
If you are regularly at the autocross track, this is a great option and I’d highly suggest you invest the extra cash for the DS series.
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Otherwise, if you really like the idea of the digressive piston and adaptive ride quality but don’t visit the track, this is still a great option.
The only true reason someone wouldn’t go with the DS series compared to the BR is their budget.
DS Series Overview:
- Mono-tube shock design
- Satin chrome finished shock body
- Ride height adjustment independent of spring preload
- 30-Clicks Of simultaneous compression and rebound adjustment (damping)
- Standard front camber plates
- Rear camber plates available for application kits
- Custom spring rates and swift spring upgrades available for some applications
- Fully rebuildable
BC Racing ER Series Coilovers
The ER series uses the same damper as the RM series, but it also implements an external reservoir on all four corners for the fluid.
You've probably seen this style of coilover before as they typically look pretty cool when they're installed.
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BC Racing uses the external reservoir to keep the fluid even cooler by placing it even further from the braking system while allowing you to use more dampening fluid.
The result of this is a coilover that is able to take the rigorous abuse of the racetrack for a much longer amount of time while being less likely to overheat.
The reservoir also allows your rebound and compression to be adjusted independently, giving you complete control over your suspension.
The RM series from BC racing is ideal for hardcore racing applications/dedicated track cars.
READ: HOW TO SET UP YOUR CAR FOR AUTOCROSS
ER Series Overview:
- Mono-tube damper
- Linear twin-piston design
- Ride height adjustment independent of spring preload
- 30-clicks of compression adjustment from the external reservoirs
- 30-clicks of rebound adjustment from the top of the damper
- Front and rear camber plates
- Front and rear pillow ball mounts standard (no camber plates)
- Custom spring rate and swift spring upgrade are available for most applications
- Fully rebuildable
BC Racing HM Series Coilovers
The HM series is a step up from the ER series.
In fact, BC Racing refers to the HM series as the perfect combination of the ER and RM series.
It shares similar features as the ER Series with its inverted damper and external reservoirs to reduce the most heat. Similar to the RM series, the HM series has that inverted mono-tube design.
The big difference here is the HM series offers independent, 2-way compression and rebound adjustments on the external reservoirs.
Having independent adjustments is highly recommended for track applications, as it allows drivers to fine-tune how their cars handle their weight into and through the corners.
If you like what the ER Series offers but you want even more adjustment, then the HM Series will be what you want to look at.
They also offer the same 30-clicks of independent adjustments for rebound and compression for that fine-tuning aspect.
These coilovers will stay cool during a hard day at the track and offer a little more customization when compared to the ER Series.
HM Series Overview:
- Standard swift springs HM Series Coilovers
- Inverted mono-tube damper
- Linear twin-piston design
- Ride height adjustment independent of spring preload
- 30-clicks of compression adjustment from the external reservoirs
- 30-clicks of rebound adjustment from the bottom of the damper
- Standard front and rear camber plates
- Standard front and rear pillow ball mounts (no camber plates)
- Fully rebuildable
BC Racing ZR Series Coilovers
Last but certainly not least, we have BC Racing's newest and most advanced addition, the ZR Series.
These are 3-way adjustable coilovers that are focused purely on racing.
While all of the other coilovers on this list offer 30-way adjustability for rebound, the ZR Series also gives you 15-way low-speed compression and 12-way high-speed compression adjustability.
Of course, all of the adjustments on this series are completely independent so that you have the absolute most adjustability possible.
Photo from BC Racing
These coilovers are designed to strictly be used on race cars as they can be tweaked to almost any possible preference.
These are BC Racing's most badass and most adjustable coilovers to date.
If you are an Adam LZ fan, he runs the ZR series coilovers in the rear on his S15 for Formula Drift Pro.
Photo from BC Racing
ZR Series Overview:
- Inverted mono-tube damper
- Linear twin-piston design
- Standard swift springs
- Ride height adjustment independent of spring preload
- 30-clicks of rebound adjustment
- 15-clicks of low-speed compression adjustment
- 12-clicks of high-speed compression adjustment
- Standard front and rear camber plates on applicable kits
- Standard front and rear pillow ball mounts (no camber plates)
- Custom spring rates available
- Custom valving Or valving paired for custom spring rate
- Fully rebuildable
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BC Racing ZX Series Coilovers Overview
If you’re looking to push your build to the absolute edge, the BC Racing ZX Series is where it’s at. This isn’t your average street setup — we’re talking full-blown, three-way adjustable race coilovers designed to give you pro-level control over your suspension.
You get 20 clicks of low-speed compression, 12 clicks of high-speed compression, and 30 clicks of rebound adjustability. That means you can dial in your setup for tight corners, long sweepers, or even your local track run — all without compromise.
The ZX Series rocks a mono-tube, dual-piston design paired with high-performance Swift Springs for killer response and ride quality. It’s also rocking high-temp fluid and external reservoirs for consistent performance during long track sessions.
If your car runs a MacPherson strut setup, the ZX goes inverted for better rigidity and heat management. Either way, this kit is built to take a beating and keep coming back for more. It’s fully rebuildable, customizable, and track-tested.
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BC Racing ASP Series Overview
Coming in hot for 2025, BC Racing is dropping the new ASP Series — perfect for drivers who want the slammed look without messing up the fancy OEM ride control systems.
Instead of swapping to full coilovers and killing your factory adaptive damping, the ASP Series lets you keep that tech fully intact. No warning lights, no weird ride quality issues — just adjustable ride height and clean fitment vibes.
These aren’t just generic lowering springs either. The ASP kit uses custom-tuned springs paired with adjustable perches, letting you fine-tune your ride height exactly how you want it. It’s the ultimate middle ground between keeping your factory handling and leveling up your stance game.
Perfect for newer platforms with electronically controlled suspension, the ASP Series is for those who want to look good, feel good, and still flex their factory features.
Final Thoughts
BC Racing is one of the best suspension brands in the industry with an entire collection of badass coilovers for every application to prove it.
So, I hope that this helped you determine which BC Racing coilovers are right for your build, or at least narrowed it down.
The biggest thing to consider—outside of your budget— is your application.
If you are just a daily driver, the BR series has literally everything you need.
If you are an avid autocrosser, drifter, or road racing fanatic, there are a few options to consider that were designed specifically for racing.
Don't forget that we offer as low as 0% financing through Affirm so you can spread out the cost into low monthly payments—you don't put your coilover purchase on hold any longer.
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If you already run BC coilovers, which series do you run? If you just figured out what series you want to get, tell us in the comments below.
Did you know we offer financing options for your build? It doesn't matter if you're just picking up a new set of wheels or creating a whole wheel and tire package along with a suspension kit. Instead of shelling out a ton of money at once, you can break that total into low monthly payments.
You could finish your build for less than you spend in gas each month!
You don't need to have a perfect credit score to finance your build or even a credit score at all! Just select a lender at checkout to get started!
On top of that, you could get as low as 0% APR and even pay off your balance early with no penalty. Put some more money in your pocket and get that build finished!
