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the R1 is the culimation of intense data and perfection over years of track use
that retains enough manners for the street
the SR series is suitable for circuit
DR Drag Racing Series
Border Racing Coilover for BMW M4 - F82 - 2014- Coilover Series:SR - Super Racing the R1 is the culimationS1 Street Series Well balanced for premium street performance and ultimate driveabilty. The perfect choice for vehicles that spend their time prowling the streets. 32 way adjustable dampening to dial in the perfect setup reinforced rubber top mount for optimal stability and shock absorption highest specification SAE9254 material spring with 6061 aluminum body for performace and weather resistance height adjustable from 60mm to 100mm below stock height
