Supertech Nissan CA18DET 84mm (+1) 30mm CH Flat Top 8.5:1 CR Piston - Set of 4 (Excl Rings)

These Supertech pistons are forged from high-strength aluminum, a common choice for performance builds because it offers a good balance of strength and weight. This set is specifically for the Nissan CA18DET engine and features an 84mm bore, which is a +1mm overbore from the stock size. The flat top design is intended to work with specific cylinder head configurations to achieve a target compression ratio of 8.5:1, making them suitable for boosted applications where controlled compression is key.

The 30mm compression height means the distance from the wrist pin center to the top of the piston is 30mm. This measurement is critical for ensuring the piston sits at the correct level within the cylinder bore at Top Dead Center, which affects valve timing and piston-to-valve clearance. Because these are performance pistons, they are sold as a set of four and do not include piston rings, as builders often prefer to select specific ring sets based on their build requirements and desired clearances.

When rebuilding or modifying your CA18DET, choosing pistons like these from Supertech means you're opting for components designed to handle increased cylinder pressures. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a trusted mechanic to ensure these pistons are the right fit for your specific engine build and performance goals.