Eagle Oldsmobile 45 4.500in Crank 7.100in H-Beam -15cc Inv Dome 4.155in Pistons Balanced Assembly

When you're building a serious Oldsmobile 45 engine, starting with a well-balanced rotating assembly like this one from Eagle is a smart move. This kit gives you the core components you need to get your engine rotating, all balanced and ready to go. It's designed for street vehicles running on pump gas and naturally aspirated setups, making it a solid choice for many performance builds.

Inside this assembly, you'll find a 4.500-inch cast crankshaft, paired with 7.100-inch H-beam connecting rods. These rods are secured with 7/16-inch ARP 8740 bolts, known for their strength and reliability. The pistons are forged 4032 aluminum from Diamond, featuring a -15cc inverted dome design and a 4.155-inch bore size. They come with plasma-moly file-fit rings, which allow for precise gap setting to match your specific engine build. To top it off, the assembly includes King SI rod and main bearings, providing smooth operation and durability for the critical journals.

This is a balanced assembly, meaning Eagle has taken the time to ensure the crankshaft, rods, pistons, rings, bearings, and any included fasteners are precisely weighted and balanced together. This crucial step helps reduce engine vibration and wear, leading to a smoother running engine and potentially longer component life. Keep in mind this assembly is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for installation details and ensure all components are properly clearanced for your specific engine block and cylinder heads.