Brand New Cast 4.2L AMC Jeep Stroker Steel 3.895″ Crankshaft

Brand New Cast 4.2L AMC Jeep Stroker Steel 3.895″ Crankshaft

Upgrade your AMC Jeep engine with this high-performance 3.895″ Stroker Crankshaft, engineered for maximum power delivery and reliability.

This is a brand-new, lightweight cast steel crankshaft designed for 4.2L AMC Jeep engines. Featuring a 3.895″ stroke, it is the ideal choice for stroker applications, significantly reducing rotational mass to improve acceleration and engine response.

🛠️ In-House Machining Process

• Debris-Free Preparation: Every new casting is chemically cleaned and blown out to remove all residual machining oils, metal shavings, and manufacturing debris. This ensures your oiling system remains uncontaminated from the first start-up.
• In-House Precision Machining: Unlike “shelf-stock” parts, we perform final inspections and precision verification in-house. This ensures perfect geometry and clearances before the crankshaft reaches your engine block.
• Dimensional Inspection: Our technicians perform a multi-point inspection of the journals and snout alignment. This ensures the crankshaft meets tight OEM and performance tolerances for a flawless fit.
• Balance Verification: Every crankshaft is verified for internal balance, reducing engine vibration and ensuring smooth operation even at higher RPMs.
• Surface Integrity Testing: We verify that the casting is free of porosity or internal defects that could compromise the strength of the journals under high-stress driving conditions.

📊 Technical Specifications

• Condition: Brand New Casting
• Engine Compatibility: 4.2L AMC Jeep Engines
• Stroke: 3.895 in.
• Material: Lightweight Cast Steel
• Engine Balance: Internal
• Rear Main Seal Style: 2-piece
• Rod Journal Diameter: 2.095 in.
• Main Journal Diameter: 2.500 in.
• Crankshaft Snout Style: Standard
• Special Requirements: Requires Narrow Bearings
• Weight Feature: Lightened design for quicker engine response

🚘 Common Applications

Ideal for AMC/Jeep Stroker Builds:

• Jeep Wrangler (YJ / TJ): 4.2L based stroker builds
• Jeep CJ-5 / CJ-7 / CJ-8 Scrambler: 4.2L upgrades
• Jeep Grand Wagoneer / Cherokee (SJ): 258ci / 4.2L engines
• AMC Eagle / Concord / Pacer: 4.2L Inline-6 performance upgrades