Brian Crower Polaris XP Turbo (16-up) / XP 1000 (14-up) Beehive Spring/Titanium Retainer/Seal Kit w/o Seats BC0900X

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 includes 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
Valve Seal	BC3991
Net Cam Lift	0.430" w/BC3991 Seal