VALVE SPRING/RETAINER KIT
Designed for high rpm, BC valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. |
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| Kit # |
Spring # |
Retainer # |
Description |
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BC0100 |
BC1100 |
BC2100 |
Single spring, titanium retainer |
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Spring Pressure:
BC1100 Seat: 1.550" @ 84 lbs / Open: 1.000" @ 235 lbs / Coil Bind: 0.935" (no machine work required) |
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STAINLESS STEEL VALVES
BC valves are made from premium stainless steel, fully machined and swirl polished for ultimate air flow. Dished head for added weight savings and increased valve control at high rpm. Standard and oversize head. |
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| Part # |
Description # |
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BC3100 |
34.0mm Intake (standard head diameter) |
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BC3101 |
30.5mm Exhaust (standard head diameter) |
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BC3102 |
34.5mm Intake (+.5mm head diameter) |
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BC3103 |
31.0mm Exhaust (+.5mm head diameter) |
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BC3104 |
35.0mm Intake (+1mm head diameter) |
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BC3105 |
31.5mm Exhaust (+1mm head diameter) |
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4G63 ECLIPSE 2.4L STROKER KIT
4G64 BLOCK 2.6L |
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BC 4340 billet steel, 7 bolt crank (102mm stroke) or 4340 6 bolt (102mm) |
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BC 4340 steel Econo or Pro Series billet rods w/ARP 220,000 psi fasteners. |
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CP aluminum forged pistons (any bore size, any compression ratio). |
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5100 Series nickel carbon steel alloy wrist pins. 9310 pin upgrade available. |
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Ductile iron plasma top rings, tapered second ring, low tension oil rings. |
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ACL Race Series bearings sold seperately. |
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Fully system balanced and ready to install. (50% deposit required) |

| Kit # |
Crank # |
Rod # |
Piston # |
Desc. |
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BC0105 |
BC5105 |
BC6104 |
BC7105 |
102mm stroke, 6-bolt w/BC625+ |
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BC0106 |
BC5105 |
BC6105 |
BC7105 |
102mm stroke, 6-bolt w/bROD |
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BC0108 |
BC5109 |
BC6108 |
BC7109 |
102mm stroke 7-bolt w/BC625+ |
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BC0109 |
BC5109 |
BC6109 |
BC7109 |
102mm stroke 7-bolt w/bROD |
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BC0110 |
BC5110 |
BC6110 |
BC7110 |
106mm stroke 7-bolt w/ 4G64 block |
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| The BC stroker kit for the Mitsubishi 4G63 engine platform incorporates a 102mm
stroke, 7 bolt crank. Depending on bore size that you decide, the BC kit will take you up to a 2.4L with
86mm bore. The 4G63 kit utilizes premium steel billet connecting rods. As usual, each BC kit features custom
CP pistons, highest quality, steel alloy wrist pins, full ring pack and buttons. Econo rods are rated up to 600
maximum horsepower, Pro Series rods rated to 800+ horsepower. |
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Stock Specifications:
4G63 85mm Bore x 88mm Stroke - 9.010" Block Height
4G64 86mm Bore x 100mm Stroke - 9.252" Block Height |
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