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 ProH2K rods are standard length and rated up to 600 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
ProH2K rods (5.906″ c-to-c)
Shelf or custom pistons (choice of bore/compression).
Wrist Pins, Full Ring Pack, and Buttons
| Part Number: | Description: | Crank: | Rod: | Piston: |
| BC0109 | 2.4L 4G63 7 Bolt | BC5109 – 102mm | BC6109 – 5.906″ | BC7109 – Custom |
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 ProH2K 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)
About BC Crankshafts:
BC crankshafts are crafted from premium aerospace-grade 4340 steel billet. They are CNC machined on advanced 5-axis Mazak Integrex 300-IV CNC machines to precise tolerances of .0001″. Each crankshaft features large radius journals for enhanced rigidity in high horsepower, high boost, and high RPM applications. The gun-drilled, CNC-ground oil holes have smooth surfaces for superior oiling, tear-dropped shapes for added 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 maximum performance. The fully profiled counterweights are designed to reduce windage through the crankcase, minimizing oil resistance and improving RPM potential.
About BC Connecting Rods:
BC connecting rods are CNC machined from aerospace-grade 4340 steel billet and come in either the European-influenced H-beam or traditional I-beam design, depending on the application. Each rod features a deep, double-ribbed cap that maintains the big end housing bore’s integrity at high RPMs, ensuring uniform bearing crush and optimal clearances for superior oil supply and maximum load capacity. H-beam rods include a deep radial groove pin bushing and oil holes at the 5 and 7 o’clock positions for critical wrist pin lubrication. I-beam rods have an oil hole at the 12 o’clock position to keep the pin end bore true under high boost. They are available with either ARP2000 fasteners, rated at 210,000 psi, or ARP’s Custom Age 625+ fasteners, rated at 280,000 psi.
Piston Options:
Choose from top piston brands like CP or JE in any desired 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 strength and minimal weight, with each piston diameter CNC machined for optimal accuracy and superior grain flow. Using 3D modeling software and rigorous Finite Element Analysis ensures the pistons are the strongest and lightest possible for your application. These custom pistons offer tighter clearances, reduced noise, better ring seal, and enhanced durability. Standard features include pin fit, carbon steel wrist pins, and spiral locks or rail supports, depending on the application. Optional upgrades include 9310 alloy wrist pins for reduced flex, lateral gas ports for improved ring seal, skirt and top coatings, and a lightweight design.
