<b>BC0900S</b> - Polaris XP Turbo (16-up) / XP 1000 (14-up) Beehive Spring/Steel Retainer/Seat Kit

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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 co nsistent pressures. BC retainers are machined from premium chromoly steel alloy for "set it and forget it" wear characteristics. Beehive spring keeps retainer lightweight. Also requires BC3991 valve stem seals. Type BC1900 Single Free Length 1.610" Seat 1.265" @ 83 lbs Open 0.850" @ 197 lbs Coil Bind 0.760" Retainer BC2901S Spring Seat BC2911 Net Cam Lift 0.450" / 11.43mm Show more