Image #1
HOME BCジャパン Espanol SHOP ABOUT FAQS Cam Regrind CONTACT
HONDA NISSAN TOYOTA SUBARU HYUNDAI MITSUBISHI DOMESTIC
B16A / B18C C30A / C32B SR20DET 2JZ NON VVT-i 2JZ VVT-i EJ205 G6DA V6 4G63 CHEVY LS
B18A / B18B K20A / K20Z KA24DE 1JZ B58B30 EJ207 G4KF 4G63 EVO VIII DODGE SRT4
H22 / H22A K20A3 / K24A VQ35 / VQ37 7MGTE 2AZFE EJ257 / EJ255 VW / AUDI 4G63 EVO IX FORD COYOTE
F20C / F22C D16Y8 TB48 3SGTE 4AGE EJ257B DUAL 1.8T 4B11 EVO X DIESEL TRUCK
MISC RB26 / RB30 1GRFE / 2GRFE 4UGSE FA20 MAZDA 6G72 JEEP
VR38DETT 3URFE 1FZFE BMW MZR
MISC MISC M50
POLARIS HONDA YAMAHA CAN-AM KAWASAKI
XP 1000 PRO R / FURY TALON YXZ X3 KRX
XP TURBO
CAMSVALVE TRAINRODSPISTONSSTROKER KITSCRANKSHEADS / CASESTURBO / COOLING
POLARIS RZR XP TURBO / ProXP - HEADS / CASES

There’s big horsepower gains to be made from proper head porting and BC offers CNC ported cylinder heads that are IN STOCK and ready to ship for immediate delivery for the Polaris RZR applications. These heads deliver the best flow characteristics in terms of strength, direction and condition of the air/fuel charge as it enters the cylinder through the intake valve. If you have exceptional charge motion, the cylinder will continue to fill even after the piston hits bottom dead center (BDC) and the air/fuel charge will evenly disperse in the chamber. All of this working cohesively makes horsepower. Each head design has seen extensive R&D, thousands of miles of testing, both on the dyno and out in the field in order to determine the absolute best performing combination of parts that also delivers unprecedented reliability. If stock bottom end or stock stroke BC billet crank with stock or Stage 2 cams, we recommend the small valve setup (+1mm stainless steel intake / +1mm Inconel exhaust). If running a stroker kit or full race application, recommend the big valve setup (+1mm SS intake / +3.8mm Inconel exhaust) for added flow and performance. Then it's ala carte on the remaining valve train. Choose from the BC single beehive valve springs wound by PAC, featuring extra processing procedures for enhanced durability, steel or titanium retainers, keepers, BC camshafts (new cores...not regrinds!) and the ARP cam cap kit and head studs are all available as add-ons.

Heads are available fully loaded and lashed with the optional BC parts for an added assembly fee of $200.

The BC core exchange program works three ways:

  1. Buy one of BC's new heads outright, no exchange.
  2. Send a new head in for even exchange for one of BC's new "in-stock" heads.
  3. Send a used head in, receive that same head back.

BC only accepts new, never-been ran Polaris (#3023773 or #3022716) cylinder heads as new core exchanges. BC uses only new heads for all new even exchanges. All heads come with BC bronze valve guides installed as well as +1mm Stainless Steel intake & +1mm or +3.8mm Inconel exhaust valves. Any valve springs, retainers, keepers, cams or ARP head studs or cam cap bolt kits are sold separately in the pulldown menus.

If sending a new head, allow 1 week for inspection before new CNC head ships. If sending a used head, allow 4-8 weeks for that head to be ported. No exchanges on used heads. Send heads for servicing here:

BrianCrower, Inc, 161 So Marshall Ave, El Cajon CA 92020

Part # Description # Buy Kit Status
BC9910 XP TURBO - CNC PORTED CYLINDER HEAD w/GUIDES AND VALVES INSTALLED (+1mm/+1mm). Specify Core Option in Store - All other parts sold separately. In-Stock
BC9911 XP TURBO - CNC PORTED CYLINDER HEAD w/GUIDES AND VALVES INSTALLED (+1mm/+3.8mm). Specify Core Option in Store - All other parts sold separately. In-Stock
BC9912 PROXP - CNC PORTED CYLINDER HEAD w/GUIDES AND VALVES INSTALLED (+1mm/+1mm). Specify Core Option in Store - All other parts sold separately. Polaris #3023564 In-Stock
BC9913 PROXP - CNC PORTED CYLINDER HEAD w/GUIDES AND VALVES INSTALLED (+1mm/+3.8mm). Specify Core Option in Store - All other parts sold separately. Polaris #3023564 In-Stock

Note: The above cylinder head packages come without camshafts, buckets, springs, retainers and keepers installed. If you want full assembly, $200 additional.

INTAKE
VALVE LIFT/CFM
OEM/STOCK BC/TPR
.050 51 58
.100 95 107
.150 140 142
.200 178 179
.250 219 221
.300 250 258
.350 269 281
.400 277 298
.450 281 311
EXHAUST
VALVE LIFT/CFM
OEM/STOCK BC/TPR
.050 36 56
.100 78 96
.150 117 132
.200 141 158
.250 161 183
.300 167 195
.350 172 205
.400 175 212
.450 177 218
POLARIS RZR XP TURBO / XP1000 HEAD GASKETS
Cometic gaskets combine advanced materials with state-of-the-art manufacturing processes to provide custom-tailored solutions to meet the needs of each individual application. The MLX head gasket is comprised of a three layer setup - Viton coated embossed spring steel outer layers surround a steel inner layer that provides support and thickness to the gasket. Embossments on the gasket allow for a proper seal around oil and water passages.

Part # Description # Thickness Buy Now Status
BC8290-1 GASKETS - Cometic (Polaris RZR XP Turbo, XP1000) - 3 Layer, .028" Thickness, works with 93, 94 and 95mm Bore .028" In-Stock
BC8290-2 GASKETS - Cometic (Polaris RZR XP Turbo, XP1000) - 3 Layer, .052" Thickness, works with 93, 94 and 95mm Bore .052" In-Stock
BC8291 GASKETS - Cometic (Polaris RZR XP Turbo, XP1000) - 3 Layer, .030" Thickness, works with 98mm .030" In-Stock
BC8290-5 GASKETS - Cometic MLS for O-Ring Cylinder Jug (Polaris RZR XP Turbo, XP1000) - 3 Layer, .036" Thickness, works with 93, 94 and 95mm Bore .036" In-Stock


POLARIS RZR XP TURBO / XP1000 BASE GASKETS
Cometic gaskets combine advanced materials with state-of-the-art manufacturing processes to provide custom-tailored solutions to meet the needs of each individual application. The base gasket is comprised of a rubber coated stainless steel in various thicknesses from .008" / .014" / .015" / .020" or aluminum base shim in various thicknesses from .032" / .040" / .050" / .080" / .125" / .250". Call for availability.

Part # Description # Bore Buy Now Status
BC8280 RUBBER BASE GASKETS - Cometic (Polaris RZR XP Turbo, XP1000, XP900) - Rubber Coated Stainless Specify In-Stock
BC8281 ALUMINUM BASE GASKETS - Cometic (Polaris RZR XP Turbo, XP1000, XP900) - Aluminum Base Shim Specify In-Stock
619.749.9018 ph
619.749.9128 fx
Some products listed are not legal for sale or use on emission controlled motor vehicles, RPM ranges vary on application.Warranty Information Copyright © Brian Crower Inc. All rights reserved..
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