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POLARIS PRO R 2.0L - VALVE SPRING & RETAINER KITS 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. Choose from the premium beehive design valve spring or the dual for those who need added stability at wide open throttle for long duration runs. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. The titanium retainer option is only designed to work in race only applications with limited miles (under 2500 annually). BC 4140 chromoly steel retainers are the correct choice for those looking to install the kit and forget about it for the rest of the engine's cycle life. Chromoly steel offers the ultimate in wear resistance and are available in a various designs depending on type of cam bucket or valve spring.

Kit #

Spring #

Retainer #

Seat #

Description

Buy Kit

Status

BC0900-2

BC1901-2

BC2901-2

BC2911-2

Single beehive spring, titanium retainer, steel seat. Race only, low miles.

In-Stock

BC0900S-2

BC1901-2

BC2901S-2

BC2911-2

Single beehive spring, 4140 chromoly steel retainer, steel seat. High mileage use.

In-Stock

BC0900B-2

BC1901-2

BC2901B-2

BC2911-2

Single beehive spring, 4140 chromoly steel retainer w/no shim capture, steel seat. For use with OEM cam buckets or running anti-lag.

In-Stock

BC0900BX-2

BC1901-2

BC2901B-2

BC3991-2 Seat/Seal

Single beehive spring, 4140 chromoly steel retainer w/no shim capture, steel seat. OEM style seat/seal combo. For use with OEM cam buckets or anti-lag.

In-Stock

BC0900X-2

BC1901-2

BC2901-2

BC3991-2 Seat/Seal

Single beehive spring, titanium retainers, OEM style seat/seal combo.

In-Stock

BC0900SX-2

BC1901-2

BC2901S-2

BC3991-2 Seat/Seal

Single beehive spring, 4140 chromoly steel retainer, OEM style seat/seal combo.

In-Stock

BC0900D-2

BC1902-2

BC2902-2

BC2912-2

Dual spring, steel retainer, steel seat. For use with OE or aftermarket buckets. A must if using anti-lag.

In-Stock

Spring Pressure: BC1901 Seat: 1.265" @ 83# / Open: 0.850" @ 197# / CB: 0.760"
Spring Pressure: BC1902 Seat: 1.265" @ 90# / Open: 0.815" @ 233# / CB: 0.770"

POLARIS PRO R CAM BUCKETS (SHIM UNDER)
Made from aerospace grade, 4140 chromoly steel alloy and completely CNC machined from heat-treated billet round bar. Heavy-duty wall thickness eliminates distortion and cam face depression, while reducing overall weight from non-critical stress areas. Nitrided and polished to a surface hardness of 60RC for minimal wear. Provides lower friction with cam lobes and cylinder head lifter bores for improved durability.

Part #

Description #

Buy Kit

Status

BC8880-2

CAM BUCKET FOLLOWERS – Polaris Pro R 2.0L

Aug 20

BC8880DLC-2

CAM BUCKET FOLLOWERS w/DLC COATING – Polaris Pro R 2.0L

Aug 20


POLARIS RZR 2.0L / PRO R - VALVE SHIM ADJUSTERS BC valve lash adjusters are CNC machined from S7 tool steel for the ultimate in wear resistance. Each shim kit includes 50 pieces from 10 varying thicknesses starting at 2.40mm thick all the way up to 2.85mm thick in 0.05mm increments. 5 shims in each thickness.

Part #

Description #

Buy Kit

Status

BC3890-2

9.48mm Lash Adjuster Shim Kit (Polaris 2.0L Pro-R)

Aug 20


POLARIS RZR 2.0L / PRO R - VALVE KEEPERS / LOCKS 5.5mm stem diameter, 7° billet performance valve stem keepers or locks are designed to fit BC and OEM retainers. Precision machined from premium billet bar stock chromoly steel and heat treated for maximum strength to insure against shoulder shearing (common with stock and lesser quality brands).

Part #

Description #

Buy Kit

Status

BC2991-2

5.5mm Stem Dia Billet Keepers / Locks (Polaris XP 1000, XP Turbo, XP900) – set/32

In-Stock

POLARIS RZR 2.0L / PRO R - STAINLESS STEEL VALVES
BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head. BC premium exhaust valves are made from Nimonic 90 blend with 5 times more tensile strength than stainless steel and a max temperature rating of 2400°F...these are the choice when running high boost.

Part #

Description

Buy Now

Status

BC3800-2

Stainless Steel - 37.8mm Intake (standard head diameter) - Set/8

In-Stock

BC3801-2

Stainless Steel - 29.2mm Exhaust (standard head diameter) - Set/8

In-Stock

BC3801N-2

Nimonic - 29.2mm Exhaust (standard head diameter) - Set/8

In-Stock

BC3802-2

Stainless Steel - 38.8mm Intake (+1mm head diameter) - Set/8

In-Stock

BC3803-2

Stainless Steel - 30.2mm Exhaust (+1mm head diameter) - Set/8

In-Stock

BC3807N-2

Nimonic - 33.0mm Exhaust (+3.8mm head diameter) - Set/8

In-Stock

POLARIS RZR 2.0L / PRO R - VALVE STEM SEALS
BC valve stem seals allow a carefully defined amount of engine oil from the cylinder head into the combustion chamber to lubricate the rotating valve stem in the valve guide. BC valve stem seals are produced from high performance Viton material and feature a steel alloy case for increased part life and lower wear. There are three valve seal options:

BC3990-2 - Trimmed down version of BC3992-2 that is intended for aftermarket guides that are not BC's threaded design. Use with any BC or aftermarket spring kit, up to .460" lobe lift.
BC3991-2 - Integrated Viton seat/seal that's similar to the stock design. Use with stock springs/retainers or BC aftermarket spring kit up to .430" cam lift.
BC3992-2 - Viton valve seal that is only intended for BC's threaded valve guides (BC3966-2). These guides are installed in BC CNC ported heads but are also available for purchase.

Part #

Description

Buy Now

Status

BC3990-2

Designed for standard valve guides (BC3965-2), 5.5mm valve stem diameter (Polaris Pro R 2.0L)

BC3991-2

Integrated seat/seal for OEM valve guides when using stock or BC spring/retainer if running stock cams or cams under.430" lift.

BC3992-2

Designed for BC threaded valve guides (BC3966-2), 5.5mm valve stem diameter (Polaris Pro R 2.0L)

Note: If using the BC0900-2 spring/retainer kit, you can run the factory seat/seal as long as max cam lift is under .430" (stock cams or BC0981 or BC0982).

POLARIS RZR 2.0L / PRO R - VALVE GUIDES
BC premium valve guides feature a threaded end where the valve stem seal goes, virtually eliminating the seal popping off at extended rpm's. Made from Manganese Silicon Aluminum Bronze alloy and CNC machined to exacting tolerances. BC guides are resistant to cracking and corrosion, while reducing friction and insures high lubrication even at elevated engine temperatures and rpm's. The perfect replacement to worn or damaged guides and 100% compatible with BC's lineup of stainless steel valves.

Part #

Description

Buy Now

Status

BC3966-2

5.5mm INTAKE & EXHAUST (Polaris Pro R 2.0L) - Features threaded end to permanently capture the valve stem seal

BC3965E-2

5.5mm EXHAUST valve guides (Polaris Pro R 2.0L) - Features standard end for BC3990-2 valve stem seals (set/4)

BC3965I-2

5.5mm INTAKE valve guides (Polaris Pro R 2.0L) - Features standard end for BC3990-2 valve stem seals (set/4)

619.749.9018 ph
619.749.9128 fx

WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov