BC Brian Crower 102mm 2.4L Stroker Kit for 7 Bolt 4G63 Evo/DSM (BC0108)

This 2.4L BC stroker kit for the Mitsubishi 4G63 engine platform incorporates a 4340 billet 102mm stroke, 7 bolt crank. The 4G63 kit utilizes premium steel billet connecting rods. H-Beam ProH625+ rods are standard length and rated up to 1000 maximum horsepower. As usual, each BC kit features custom CP pistons (choice of bore/compression), highest quality, steel alloy wrist pins, full ring pack and buttons.

Vehicle Fitment:
1992-2006 Mitsubishi Evolution I-IX (Evo 1-9)
1992.5-1999 Mitsubishi Eclipse GST/GSX
1992.5-1998 Eagle Talon TSi
1992.5-1994 Plymouth Laser RS
(4G63/4G64 7 Bolt Engine)

Purchase Includes:
4340 billet crank (7 bolt)- 102mm stroke
ProH625+ rods (5.906" c-to-c)
Shelf or custom pistons (choice of bore/compression).
Wrist Pins, Full Ring Pack, and Buttons

Notes:
ACL bearings avail separately.
LightWeight crank design ("LW") available for an Additional Charge (Please call to enquire).

Feautres:
• BC 4340 billet steel crankshaft
• BC H-Beam ProH625+ rods (150mm- standard length)
• CP or JE aluminum forged pistons (any bore size, any compression ratio)
• 5100 Series carbon steel alloy wrist pins. (9310 Series pin upgrade avail.)
• Ductile iron plasma top rings, tapered second ring, low tension oil rings.
• Fully system balanced and ready to install. (50% deposit required)

BC Crankshafts:
BC crankshafts are crafted from premium aerospace-grade 4340 steel billet and CNC machined on advanced 5-axis Mazak Integrex 300-IV machines to precise tolerances of 0.0001". Each crankshaft includes large radius journals for enhanced rigidity in high horsepower, high boost, and high RPM applications. Gun-drilled, CNC-ground oil holes have a smooth surface for improved oiling, tear-dropped shapes for better oil scooping, cross-drilled for priority main feeding to the rods, and are micro-polished to a mirror finish for optimal bearing lubrication. All crankshafts undergo stress relief, shot peening, magna flux inspection, and nitriding (a multi-step heat treatment) for superior performance. The fully profiled counterweights are designed to reduce windage through the crankcase, minimizing oil resistance and improving RPM potential.

BC Connecting Rods:
BC connecting rods are CNC machined from aerospace-grade 4340 steel billet and are available in either the European-influenced H beam or the traditional I beam design for certain applications. Each rod features a deep, double-ribbed cap to keep the big end housing bore true at high RPMs, ensuring uniform bearing crush and optimal oil supply for maximum load capacity. The H Beam rods include a deep radial groove pin bushing and oil holes at the 5 and 7 o'clock positions, acting as a trough for critical wrist pin lubrication. I Beam rods have an oil hole at the 12 o'clock position to maintain the pin end bore's integrity under high boost. You can choose between ARP2000 fasteners, rated to 210,000 psi, or the superior ARP Custom Age 625+ fasteners, rated to 280,000 psi.

BC Pistons:
Choose from top piston brands like CP or JE, available in any bore size and compression ratio. Both brands craft their custom BC stroker pistons from 2618 T6 high tensile strength forged aluminum. These pistons are computer-designed for maximum strength and minimal weight. Each piston is CNC machined for optimal accuracy and superior grain flow. Advanced 3D modeling software and Finite Element Analysis ensure the pistons are both strong and lightweight. These custom pistons offer tighter clearances, less noise, better ring seal, and enhanced durability. Standard features include pin fitting, carbon steel wrist pins, and spiral locks or rail supports, depending on the application. Additional features include upgraded 9310 alloy wrist pins for reduced flex, lateral gas ports for improved ring seal, skirt and top coatings, and a lightweight design.

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