Eagle Honda K20/K24 4.173in/106mm Stroke 4340 Billet Steel Crankshaft

Forged from a solid piece of 4340 billet steel, this Eagle crankshaft is built for serious performance in Honda K-series engines. The 4.173-inch (106mm) stroke is a notable increase over stock, designed to help you extract more power and torque from your K20 or K24 powerplant. This isn't just a replacement part; it's a foundational piece for a high-output engine build.

Choosing billet 4340 steel means you're getting a crankshaft that can handle significantly more stress than cast or even standard forged cranks. This material is known for its strength and durability, making it a popular choice for applications where reliability under extreme conditions is paramount. The 106mm stroke is carefully machined and balanced to ensure smooth operation, even at high RPMs. This crankshaft is a key component for anyone looking to build a custom engine for racing, track days, or aggressive street performance.

When undertaking an engine build of this caliber, it's crucial to ensure all supporting components are up to the task. This crankshaft is designed to be a direct replacement for the factory unit in terms of mounting points and basic dimensions, but its increased stroke will require careful consideration of piston compression height, connecting rod length, and camshaft profiles to achieve optimal performance and prevent interference. Always refer to the manufacturer's detailed installation instructions and consult with an experienced engine builder to ensure proper assembly and tuning for your specific application.