Wiseco Toyota 4AG 4V 19mm Pin DOME +5.9cc Piston

If you're rebuilding the engine in your 1985-1989 Toyota MR2, especially for performance applications, this Wiseco forged piston set is built to handle serious stress. These pistons are designed for the 4AG 4-valve engine and feature a dome that adds 5.9cc, intended to increase compression for more power. Wiseco makes these in the USA from 2618 aluminum, which gives them improved tensile strength for demanding use.

Wiseco puts a lot of thought into the details with these pistons. You'll find precision ring grooves, an anti-detonation groove, and features that help seal the rings better, all contributing to improved performance and durability. They also come with an ArmorGlide skirt coating. This coating helps reduce friction, makes operation quieter, and resists seizure, which is crucial when an engine is pushed hard. The fully machined crown and forced pin oiling are also notable features that contribute to their ability to withstand heavy to severe duty performance builds.

This set includes four pistons, each with an 81.50mm bore and a 19mm pin diameter. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For serious racers and builders, these pistons are a well-built option designed to remove limits in your build.