Vehicle Fitment
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2015+ Ford Mustang
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S550 chassis
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EcoBoost, GT, Mach 1, GT350 (application-specific)
(Street, canyon, autocross, and track-day capable)
Why the BR Series Is the Benchmark
The BR Series hits the sweet spot between comfort, performance, and long-term ownership.
Key Features
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30-way single adjustable damping (compression & rebound combined)
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Fully height-adjustable threaded shock bodies
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Monotube damper design for consistent performance
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Custom spring rates matched to S550 chassis
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Rebuildable and revalvable (huge long-term value)
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Optional camber plates available
Translation: it’s adjustable where it matters and durable where cheap kits fail.
Lowering an S550 Mustang (Without Screwing It Up)
The S550 chassis loves a controlled drop. It hates being slammed.
Recommended ride heights:
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1.0–1.5 inches: Ideal for daily driving and spirited street use
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1.5–2.0 inches: Aggressive street/track stance (alignment mandatory)
Go lower and you’ll introduce:
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Reduced suspension travel
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Increased bump steer
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Harsh bottoming over real roads
BC Racing’s design allows you to lower the car without sacrificing shock travel, which is why these actually drive well when lowered.
Front Spring Rates: 62-180-7 Kgf/mm // Rear Spring Rates: 110-99-230-14-V Kgf/mmThe BR Series Model is the perfect choice for street driving and the occasional road course or autocross duty. With easily accessible adjustment knobs for fine-tuning compression and rebound, ride height adjustment independent of shock stroke and spring preload, having a performance coilover system has never been easier.
The driver chooses how low or high the vehicle sits (no 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 pillowball mounts to proved the most feedback possible from the suspension and to sharpen steering response. BC Racing front camber plates also allow a driver to get the perfect alignment setup without compromise. Each of these features is offered, while providing a strong, attractive coilover system at a reasonable price.
Features: MONO-TUBE SHOCK DESIGN
LINEAR PISTON AND DAMPING CURVE
HEIGHT ADJUSTMENT VIA SHOCK BODY, NOT SPRING
30-CLICKS OF DAMPING ADJUSTMENT (COMPRESSION/REBOUND) SIMULTANEOUSLY
FRONT CAMPER PLATES STANDARD ON APPLICABLE KITS
READ CAMBER PLATES AVAILABLE ON APPLICABLE KITS
CUSTOM SPRING RATES AND SWIFT SPRINGS AVAILABLE FOR MOST APPLICATIONS
CUSTOM VALVING AND/OR VALVING PAIRED FOR CUSTOM SPRING RATES
1 YEAR LIMITED WARRANTY AGAINST MANUFACTURER DEFECT
FULLY REBUILDABLE WITH ALL PARTS AVAILABLE FOR PURCHASE
Ride Quality: Adjustable, Predictable, Adult
With 30 damping clicks, you can actually tune the car instead of tolerating it.
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Softer settings → daily comfort, rough pavement tolerated
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Mid settings → balanced street performance
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Firmer settings → sharp response, reduced body roll
Compared to stock suspension:
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Less float at speed
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Better control over bumps
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More confidence under braking and cornering
Firm when you want it. Civil when you need it. Wild concept.
Alignment After Installation (Yes, You Still Need One)
Lowering an S550 always changes alignment geometry.
What changes:
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Increased negative camber up front
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Toe shifts out of spec (tire killer #1)
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Caster affects steering return and stability
Strongly recommended:
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Professional alignment at final ride height
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Adjustable camber plates (BC or equivalent)
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Keep toe near factory specs for street use
Good coilovers + bad alignment = fast tire death.
Handling Gains You’ll Actually Feel
Once installed and aligned, expect:
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Sharper turn-in
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Reduced nose dive under braking
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Less body roll
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Way more mid-corner confidence
No, it won’t turn your Mustang into a GT3 car—but it will feel like Ford under-sold the chassis.
Build Quality & Ownership Notes
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Corrosion-resistant finishes
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Monotube dampers designed for heat control
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Massive aftermarket support
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Easy rebuild availability
Install tip: Anti-seize the threads. Adjustable coilovers that seize are just expensive statues.
Who These Coilovers Are For
✔ Daily-driven S550 Mustangs
✔ Street + track crossover builds
✔ Owners who want real adjustability
✔ People who plan to keep the car
❌ Budget-only builds
❌ Extreme slammed setups
❌ “Alignment is optional” thinkers
Michael –
They fit my 2020 Mustang gt