Brian Crower Polaris XP Turbo (16-up) / XP 1000 (14-up) Beehive Spring/Titanium Retainer/Seat Kit BC0900

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 6AL4V titanium alloy for added valve control above 10,000 rpm. 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	BC2901
Spring Seat	BC2911
Net Cam Lift	0.450" / 11.43mm