BC Racing BR Series Coilovers - 2002-2006 Infiniti Q45 (F50)

Save $304.00
BC RacingSKU: D-71-BR-SP
Rated 5.0 out of 5 stars
1 Review

Sale price$1,695.00 Regular price$1,999.00
In Stock (only 2 units left)
Ships direct from BC Racing North America


BC Racing BR Series Coilovers for the 2002-2006 Infiniti Q45 (F50) offer the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle, then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable.

BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series.

With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System. BC Racing BR Series is the most popular coilover option from BC Racing.


  • Highly customizable
  • Mono-tube shock design
  • Linear piston and damping curve
  • Height adjustment independent of spring compression
  • 30-clicks of simultaneous compression/rebound adjustment
  • Front camber plates standard on applicable kits
  • Rear camber plates available for applicable kits
  • Custom spring rates and Swift Springs available
  • Custom valving or valving paired for custom spring rates
  • 2 year warranty against manufacturing defects
  • Fully rebuildable

Please note that not all vehicles can use camber plates in the front and/or rear. Most vehicles will have top mounts included, but some will reuse OEM upper mounts.

Part Number D-71-BR-SP
Part Name BR Series Coilovers
Vehicle 2002-2006 Infiniti Q45
Chassis Code F50
Front Springs (kg/mm) 62-180-8kg
Rear Springs (kg/mm) 62-220-5kg / 102-102-260-6kg-V
Front Swift Springs (kg/mm) 62-178-X
Rear Swift Springs (kg/mm) 62-228-X Only
Front Camber Plates Included
Rear Camber Plates Not Applicable
Note 1 True Coilover Rear shock plus 6k optional spring for OEM spring position.
Note 2 Fits 2002-2006 Nissan Cima JDM
Note 3 Front spindle optional
  • 2002 Infiniti Q45 (F50)
  • 2003 Infiniti Q45 (F50)
  • 2004 Infiniti Q45 (F50)
  • 2005 Infiniti Q45 (F50)
  • 2006 Infiniti Q45 (F50)

In-Stock Products: 1-3 business days

Products that are in-stock and do not require customization ship the same business day if ordered before 2pm ET. Orders placed after 2pm ET will ship the following business day. 

Out of Stock: About 3-4 weeks

If an item is out of stock, the average lead time is 3-4 weeks before shipping.

Custom Builds: About 3-4 weeks

Custom builds include any combination of the following options:

  • Custom spring rates
  • Extreme Low
  • Swift Springs
  • DS Series
  • ER Series
  • HM Series
  • RM Series
  • ZR Series

Custom spring rates are available at no additional cost. Rates up to 20K are available in both BC Racing springs and Swift Springs. Rates ranging from 20K to 40K will require Swift Springs.

Transit Time: 1-6 days

All BC Racing Coilovers ship UPS Ground from BC Racing North America located in Oviedo, FL. The map below shows the average time it takes for the shipment to arrive at its destination.

  • All coilover kits are 2WD unless specified AWD
  • Notes regarding electronic damping (EDC, DDS, etc.) pertain to physical fitment only. BC Racing coilovers DO NOT interface w/ OEM electronic damping control systems.
  • All prices, specs, fitment, and drop are subject to change without notice.
  • All warranty claims must be submitted to BC Racing North America.
Rated 5.0 out of 5 stars
Based on 1 review
100%would recommend this product
1 review
  • D
    Flag of United States
    Verified Buyer
    Rated 5 out of 5 stars
    Best thing for the 3rd gen q45

    Bc racing makes great coilovers but these in particular are very great for this car because there are only 2 options for front strut with knuckle. Oem and bc racing. Both around the same price so might as well upgrade to coilovers. They feel very firm and ride great. I love the adjustability so I can tune the suspension to how I want it. The springrates team did a great job of taking care of me and getting me the product that I want. Fast shipping after the custom build order. I would definitely buy more products from springrates.com

    S Profile picture for Springrates.com
    8 months ago
    Thanks for the review and feedback, Derek! We're glad that you're enjoying these coilovers on your Q45!
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