CP Piston & Ring Set for Toyota 4AG 20V - Bore (81.5mm) - Size (+0.5mm) - CR (12.0) - Single Piston

CP Pistons is known for making strong internal engine components, and this forged piston and ring set for the Toyota 4AG 20V is a great example of their work. If you're rebuilding the heart of your 4AG engine, especially if you're looking to improve performance or durability, a set of well-built forged pistons like these can make a big difference. They are designed to handle more stress than stock cast pistons, making them a popular choice for modified engines.

This particular set is sized at 81.5mm with a +0.5mm oversize, meaning it's intended for engines that have been bored out slightly from their original dimensions. The compression ratio is set at 12.0:1, which is a notable increase over stock and will contribute to more power when paired with appropriate tuning. Forged pistons are made from a solid block of aluminum that's heated and hammered into shape, giving them a much stronger grain structure and better resistance to detonation and high temperatures compared to cast pistons.

When installing these, remember they are a specific size (+0.5mm) and designed for the 4AG 20V engine. Ensure your engine block has been properly machined to the correct bore size to accept these pistons. This set includes the pistons and the necessary rings to get your engine back together.