RSK639 - Rear Suspension Kit For 15" Conversion Kit

BMR Suspension has taken the guesswork out of making huge launch improvements to the 2015-2019 Cadillac CTS-V, and put it all in one convenient kit. Countless hours of design, engineering, and track testing gives you the best combination of parts for remarkable traction and launch consistency on the street and track. Matching specific components and improving suspension geometry provides you with an incredible blend of performance and drivability. This is the perfect suspension solution for anyone looking for the ultimate in street and track performance.

BMR's Rear Suspension Kit (RSK639) addresses all the major points of the rear suspension, improving the "œsystem" and not just a few components. BMR Suspension designed the RSK639 to work well for street performance and drag race applications. The entire system is 100-percent bolt-in and require zero cutting, welding, or modification to the chassis or suspension.

BMR's RSK639 Rear Suspension Kit is designed to give you the ultimate in straight-line performance, while remaining comfortable enough to drive on the street. The combination of parts is designed to truly transform the car into a track monster. This kit addresses nearly all parts of the rear suspension system. Whether you're seeking enhanced control for your everyday vehicle, or superior performance across all applications, rely on BMR Suspension!


Upper Control Arms (UCA631)
Stock stamped steel control arms with soft rubber bushings deflect under load and absorb power instead of transferring it to the tires. BMR's non-adjustable tubular control arms for 2015-2019 Cadillac CTS-V's (UCA631) are manufactured from heavy-duty 1.25-inch DOM steel tubing. The open end is formed from CNC laser cut, CNC formed 3/16-inch steel plate. It features zinc-plated two-piece, X-series, heat-treated, chrome-moly, self-lubricating, Teflon-lined rod ends for reduced deflection and increased articulation. This design gives you a lightweight, strong control arm that greatly improves performance, ensuring more power gets to the tires.

BMR Suspension designed the UCA631 to work well for street performance and drag race, and road race applications. The stock control arms flex under load giving you inconsistent launch characteristics. Combine this with soft bushings that have massive amounts of deflection and you're left with poor performance. The UCA631's lightweight, yet strong construction eliminates control arm flex, giving you much improved repeatability on the street or starting line. BMR's rod ends allows for fine-tuning and bind-free suspension articulation needed for superior handling. This means better throttle response, quicker 60-foot times, and improved all-around performance.