Supertech Subaru EZ30R 89.20mm Bore -18cc Dish 8.5:1 CR Piston- Set of 6 (Use SWF20070-0/Excl Rings)

This Supertech piston set includes six forged pistons designed for Subaru EZ30R engines. Each piston features an 89.20mm bore and a -18cc dish volume, resulting in a compression ratio of 8.5:1. These pistons are intended for use with the SWF20070-0 ring set, which is sold separately.

Forged from high-strength aluminum alloy, these pistons are built to withstand the demands of performance applications. The dish volume is specifically calculated to achieve the 8.5:1 compression ratio, which is a common target for naturally aspirated or mild forced induction builds seeking a balance between power and reliability. The 89.20mm bore is a standard size for many EZ30R rebuilds, ensuring a proper fit within the cylinder walls when used with appropriate machining.

When rebuilding your EZ30R engine, using a well-built set of forged pistons like these from Supertech is crucial for durability and performance. Remember that these pistons do not include piston rings, so you will need to source the compatible SWF20070-0 ring set separately to complete the installation. It's also important to note that this product is not CARB approved and cannot be shipped to California.