Wiseco Toyota 4AG 4V DOME +5.9cc (6533M815 Piston Shelf Stock Kit

If you're rebuilding the engine in your 1985-1989 Toyota MR2 for serious performance, these Wiseco forged pistons are built to handle the demands of racing. They are designed for the 4AG engine, specifically the 4-valve variant, and come in a set of four with an 81.50 mm bore size. These pistons are crafted from 2618 aluminum, a well-known material for its strength in high-performance applications.

Wiseco machines these pistons in the USA, focusing on precision details like anti-detonation grooves and features that improve ring seal, which are crucial for preventing detonation and maintaining compression under extreme conditions. They also come with an ArmorGlide skirt coating. This coating helps reduce friction, making the engine run quieter and more smoothly, while also offering resistance to seizure, a common issue in high-stress engines. The crown is fully machined, and the pistons feature forced pin oiling to ensure the wrist pins stay well-lubricated.

This set is intended for heavy to severe duty race builds where durability and consistent performance are paramount. Please note that these pistons are not CARB approved and cannot be shipped to California. Ensure you check all manufacturer installation guidelines before beginning your build.