Wiseco Toyota 4AG 4V Domed +5.9cc (6506M82 Piston Shelf Stock Kit

When you're rebuilding the engine for your 1985-1989 Toyota MR2, especially for demanding performance builds, you want parts that can handle the stress. This Wiseco Professional Series piston set is built for those situations. You get four forged pistons, each with a domed top that adds 5.9cc of volume, designed to work with the 4AG 4-valve engine. These aren't just off-the-shelf parts; they're crafted for serious racers and builders who push their engines hard.

Wiseco makes these pistons in the USA from 2618 aluminum, which offers improved tensile strength for durability under high loads. They feature precision ring grooves, anti-detonation grooves, and other features to help seal the combustion chamber better. Plus, they come with ArmorGlide skirt coating. This coating helps reduce friction, resist seizing, and makes the engine run quieter. The fully machined crown and forced pin oiling are also notable details that contribute to their robust design for heavy-duty race applications.

This kit includes everything you need to get these pistons installed, including the premium rings. Remember, these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.