Supertech Subaru WRX 2.0L (JDM Spec C) 93mm (+1) -4.5cc Dish 8.5:1 CR Piston - Set of 4 (Excl Rings)

Forged from high-strength 4340 aluminum, these Supertech pistons are built to handle the demands of a performance Subaru WRX 2.0L engine, specifically the JDM Spec C variant. The -4.5cc dish design is crucial for achieving a precise 8.5:1 compression ratio, which is ideal for boosted applications where detonation control is paramount. Each piston measures 93mm, representing a +1mm overbore from the factory specification, allowing for a clean-up hone or to compensate for previous engine wear.

These pistons are designed as a direct replacement for the factory units, but they come without piston rings, meaning you'll need to source those separately to complete the assembly. The 4340 aluminum construction offers a strong yet lightweight solution, helping to reduce reciprocating mass for improved engine response. This set is intended for builders who are looking to rebuild or upgrade the engine internals of their Subaru WRX 2.0L JDM Spec C, providing a solid foundation for enhanced performance and reliability under demanding conditions.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and torque specifications. A proper cylinder bore hone is essential to ensure correct ring seal and oil control. Given the performance nature of these components, it is highly recommended to consult with a professional engine builder to ensure all aspects of the engine assembly are addressed for optimal results.