CP Piston Cummins 5.9L 12V - Bore 4.020 - Single

This is a single CP Pistons forged piston designed for the Cummins 5.9L 12V engine. It features a 4.020 inch bore, which is a common size for rebuilding or upgrading these robust engines. If you're looking to rebuild the top end of your 5.9L 12V Cummins, a well-built piston like this is a critical component for ensuring reliable performance and longevity.

CP Pistons is known for making strong internal engine components. This piston is forged, meaning it's made from a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable piston than cast pistons, making it ideal for engines that see heavy use or are modified for increased power. The 4.020 bore size is important to note; it's a specific size that needs to match your cylinder block's condition. If your block has been bored out previously, this size will be a direct fit. If not, you'll need to ensure your block is machined to this exact dimension for proper fitment and sealing.

When rebuilding an engine, especially a diesel like the Cummins 5.9L 12V, attention to detail is key. This piston is sold individually, so you'll need to order the correct quantity for all cylinders in your engine. It's always a good idea to consult with your machine shop or a trusted mechanic to confirm all the necessary dimensions and specifications before ordering parts for a major engine overhaul. Remember, this piston is not CARB approved and cannot be shipped to California.