BC Racing ER Series Coilover System (1999 - 2004 Ford Mustang Cobra - With IRS) - E-11-ER
Dual-Adjustable Coilovers for the 1999 - 2004 Cobra IRS
Take your independent rear suspension (IRS) Cobra to the next level with the BC Racing ER Series Coilover System. Designed specifically for the 1999 - 2004 Ford Mustang Cobra with IRS, this advanced system delivers independent 30-click compression and rebound adjustability through external remote reservoirs that expand oil capacity and enhance heat dissipation. The result is unmatched control, superior chassis response, and consistent performance under even the most demanding conditions - ideal for both street and track enthusiasts.
Performance Highlights
- Two-way independent damping adjustment for precise compression and rebound tuning.
- External reservoirs increase oil capacity, reducing heat and maintaining performance consistency.
- Mono-tube twin-piston design ensures smooth, linear response and optimal feedback.
- Independent ride height adjustment allows stance customization without affecting spring preload.
- Front and rear camber plates for refined alignment and cornering precision.
- Pillowball mounts standard where camber plates are not applicable for sharper steering feedback.
- Custom valving options to match your selected spring rates and driving goals.
- Swift spring compatible for lighter, more responsive spring performance.
- Fully rebuildable and serviceable for long-term reliability and fine-tuning.
- 2-year manufacturer warranty against defects for total confidence.
Quick Specs
- Brand: BC Racing
- Series: ER Series
- Part Number: E-11-ER
- Vehicle: 1999 - 2004 Ford Mustang Cobra (Independent Rear Suspension)
- Design: Mono-tube twin-piston with remote reservoirs
- Adjustability: 30-way compression (external) / 30-way rebound (top of damper)
- Spring Rates: Front 6kg/mm | Rear 8.5kg/mm
- Camber Plates: Front and rear (where applicable)
- Pillowball Mounts: Included (where camber plates do not apply)
- Warranty: 2 Years (Manufacturer Defect)
- Rebuildable: Yes
Why Choose BC Racing ER Series Coilovers?
The BC Racing ER Series Coilovers are the ultimate suspension upgrade for the IRS-equipped 1999 - 2004 Mustang Cobra. With fully independent compression and rebound adjustment, you gain precision control over handling balance and ride comfort. The external reservoirs increase oil volume for improved temperature management, making these coilovers ideal for both aggressive street use and competitive track driving. If you want race-proven control, superior adjustability, and consistent performance, the ER Series delivers.
FAQs
What makes the ER Series different from the BR or DS Series?
The ER Series offers independent two-way damping with external reservoirs, allowing far greater tuning precision than the BR or DS Series, which use shared damping circuits.
Will this fit all 1999 - 2004 Mustang models?
No. This kit is specifically designed for the 1999 - 2004 Ford Mustang Cobra with independent rear suspension (IRS) and will not fit solid axle models.
Are these coilovers street-friendly?
Yes. The 30 levels of damping adjustment allow you to set up the coilovers for daily comfort or track-focused stiffness with ease.
Can I request custom spring rates or Swift springs?
Yes. BC Racing offers custom spring rates and Swift spring upgrades for optimized handling and ride characteristics.
Fitment
- 1999 Ford Mustang Cobra (IRS)
- 2000 Ford Mustang Cobra (IRS)
- 2001 Ford Mustang Cobra (IRS)
- 2002 Ford Mustang Cobra (IRS)
- 2003 Ford Mustang Cobra (IRS)
- 2004 Ford Mustang Cobra (IRS)
Why Buy from Beefcake Racing?
Beefcake Racing is your trusted authorized BC Racing dealer, specializing in high-performance suspension systems for Mustangs and other performance platforms. We offer expert support, fast delivery, and competitive pricing to help you get the best setup for your Cobra. For recommendations or custom spring rates, reach out to sales@beefcakeracing.com or call 1-855-827-7223. Beefcake Racing - Performance Starts Here.
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