BC0900D-2 - Polaris RZR Pro-R (2022/2023) Dual Spring/Steel Retainer/Seat Kit

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC retainers are machined from premium chromoly steel alloy for "set it and forget it" wear characteristics. Also requires BC3991 valve stem seals. Type BC1902 Single Free Length 1.610" Seat 1.265" @ 90 lbs Open 0.850" @ 233 lbs Coil Bind 0.770" Retainer BC2902 Spring Seat BC2912 Net Cam Lift 0.450" / 11.43mm