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90-99 Eclipse 4G63 Performance Crankshafts

Eagle Crankshafts

Eagle Crankshafts for the 90-99 Mitsubishi Eclipse 4G63 are made of 4340 steel and go through a multi-stage heat treatment and use non-twist forging. They are stress-relieved, shot-peened, x-rayed, magnafluxed, and sonic tested. The crankshafts are cross-drilled and have chamfered oil holes for improved oiling. The journals are precision-ground and micro-polished to under 5 RA. When buying Eagle you are getting top quality parts that will withstand almost anything you can throw at it!


  • Note:
  • Be sure you know wether you have a 6 bolt or a 7 bolt 4G63 before ordering.
  • FITMENT:
  • Mitsubishi Eclipse 1990-1992 4G63 (6 Bolt ONLY)
Description Part # MSRP Price Inventory  
Stock Stroke 6-Bolt Crankshaft CRS2034655900A6 $786.89 $670.57 2 available
100mm Stroker 6-Bolt Crankshaft CRS2439375900A6 $786.89 $670.57 2 available
Manley Performance Crankshafts (6-Bolt Only)

Manley Performance crankshafts are designed with the highest standards in mind. Each crankshaft is put through a multi-step heat treatment process and nitrided (hardened) for maximum strength. The crankshaft is then stress relieved, shot peened, and magnafluxed (stress tested). The center, crank pin and counterweights are gun drilled for reduced weight.

Race Series forged crankshafts are a major improvement over the OEM piece and feature special teardrop, diagonal oiling features not found on stock OEM style cranks.

Manley Turbo Tuff Billet 4340 crankshafts are the perfect crank to complete a stout bottom end build if massive horsepower is your goal. Manley Turbo Tuff Series Billet Mitsubishi 7 bolt crankshafts feature uniquely designed, ultra-lightweight, full contoured counterweights resulting in reduced windage and maximum performance.


  • Specs:
  • Multi-step heat treatment process
  • Nitrided, Stress Relieved and Shot Peened
  • 100% Magnafluxed
  • Gun drilled crank pin and counterweights
  • Be sure you know wether you have a 6 bolt or a 7 bolt 4G63 before ordering.
  • FITMENT:
  • Mitsubishi Eclipse 1993-1999 4G63 (7 Bolt ONLY)
Description Part # MSRP Price Inventory  
4G63/4G64 7 Bolt - 88mm / 33.5 lbs Stroke Race Series 190100 $843.75 $654.75 3 available
4G63/4G64 7 Bolt - 100mm / 37 lbs Stroke Race Series 190120 $887.50 $688.70 Ships from factory in 2-3 days
4G63/4G64 7 Bolt - 94mm / 36 lbs Stroke Turbo Tuff Series 190110B $1,781.25 $1,382.25 1 available
4G63/4G64 7 Bolt - 100mm / 38 lbs Stroke Turbo Tuff Series 190120B $1,781.25 $1,382.25 2 available
K1 Technologies Crankshafts (7-Bolt Only)

It is no secret that K1 Technologies has the innovation and resources bring you some of the best performance crankshafts available on the market today. All K1 crankshafts are 4340 steel, core hardened and tempered to reduce stress and optimize tensile strength. K1 Technologies crankshafts are made with a nitriding process for optimal hardening, designed to prevent softening between the journals and eventual deformation. K1 crankshafts also feature straight oil holes for more efficient rod journal oiling. Each K1 crankshaft is magnetic particle inspected and held to a maximum tolerance of .0002in journal dimension. Counterweights are placed for optimal load reduction and ease of balancing. K1 Technologies connecting rods are quality built from billet 4340 steel for superior strength in high horsepower applications. K1 has also called upon the experts at ARP fasteners to design special K1 proprietary rod bolts with asymmetrical threads to equally load each thread when under pressure. K1 rods are shot peened for improved fatigue life and are finished in the USA using only state of the art Sunnen hones. K1 rod housing bore tolerances of +/- .000050in (50 millionths) match some of the tightest accepted tolerances in the industry. All K1 rod sets are weight-matched to +/- 1 gram and boxed with the individual rotating, reciprocating, and total weights conveniently noted for balancing. A special wrist pin bushing material is also used with these assemblies offering optimal friction reduction.


  • Note:
  • Includes main and rod journals
  • FITMENT:
  • Mitsubishi Eclipse 1993-1999 4G63 (7 Bolt ONLY)
Description Part # MSRP Price Inventory  
K1 Light Weight Crankshaft, 88mm Stroke, 31lbs M8804G63-L $1,464.96 $1,464.96 Usually ships in 7-10 days
K1 Light Weight Crankshaft, 100mm Stroke, 31lbs M10004G63-L $1,464.96 $1,464.96 Usually ships in 7-10 days
K1 Std. Weight Crankshaft, 88mm Stroke, 32lbs M8804G63 $1,425.60 $1,425.60 Usually ships in 7-10 days
K1 Std. Weight Crankshaft, 100mm Stroke, 32lbs M10004G63 $1,425.60 $1,425.60 Usually ships in 7-10 days
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1635 Bustleton Pike, Suite B, Feasterville, PA 19053
Tel: 215.489.2820
Hours:
Mon-Fri 8am-6pm

©2016 JSC Speed Inc.
All Rights Reserved.

1635 Bustleton Pike,
Suite B
Feasterville, PA
19053

Tel: 215.489.2820