Polaris Pro-R Beehive Spring/Steel Retainer/Seal Kit w/o Seat

Brian Crower beehive valve spring, steel retainer and seal kit for the Polaris RZR Pro R, built for high rpm. It runs without separate seats, and the beehive spring keeps the retainer light.

Why it holds up

• BC valve springs by PAC Racing, wound from clean chrome silicone alloy
• Proprietary processing for consistent spring pressures
• Retainers machined from chromoly steel for set it and forget it wear
• BC1900-2 single spring: 1.610 in free length, 83 lbs at 1.265 in seat, 197 lbs at 0.850 in open, 0.760 in coil bind
• BC2901S-2 retainer, 0.430 in net cam lift with BC3991 seal

Fits

• Polaris RZR Pro R

In the box

• BC1900-2 beehive valve springs
• BC2901S-2 steel retainers
• BC3991-2 valve stem seals

Good to know

• Does not work with camshafts over 0.430 in lift. Retainer to seal contact will cause extensive damage to the head.