Eagle Honda K20/K24 4340 Billet Crankshaft

What you get with this Eagle crankshaft is a solid billet 4340 steel unit, specifically made for Honda K20 engines with a 3.661-inch stroke. This isn't just any crankshaft; it's built from a solid piece of 4340 steel, which is a strong material known for its durability under high stress. This makes it a great choice if you're rebuilding the heart of your engine and want something that can handle more than stock power levels.

Eagle has put some serious work into making this crankshaft robust. They've given it .125-inch fillet radii, which are essentially the curves where the shaft transitions from the journal to the counterweight. By making these radiuses larger, they significantly increase the strength in those critical areas, helping to prevent cracks. Because of these larger radiuses, you'll need to use chamfered or narrowed bearings, which are designed to work with this specific setup. The crankshaft also gets a nitrided surface treatment and is micropolished. Nitriding hardens the surface, making it more resistant to wear and fatigue, while the micropolishing ensures a super smooth finish for reduced friction and better oil flow.

This crankshaft is a substantial upgrade for any Honda K20 build where reliability and performance under load are key. It's designed to be a direct replacement for the stock crankshaft, but with significantly improved strength and longevity. If you're pushing your K20 beyond its original limits, this Eagle billet crankshaft is a well-built foundation to build upon.