RS-R SUSPENSION SUPER DOWN REAR FOR NISSAN DAYS ROOKS B21A FF N520SRBrand RS R Product Number N520SR Compatible Car NISSAN DAYS ROOKS B21A FF Product Description Model Year: 2014 2 ~ ENGINE CAPACITY: 660 NA Series: RS R SUPER DOWN set: R down width (mm): 60 ~ 55 spring rate (kg mm): 2. 04 matching grade: Model Year: 2014 2 ~ ENGINE CAPACITY: 660 NA Series: RS R SUPER dOWN set: R down width ( mm): 60 ~ 55 spring rate (kg mm): 2. 04 matching grade: Model Year: 2014 2 ~ ENGINE CAPACITY: 660 TB Series: RS R SUPER dOWN