JE Pistons Ultra Series Honda K20A 87.5mm Bore 10.0:1 CR Set of 4 Pistons

If you're building a high-horsepower Honda K20A engine, especially one intended for forced induction like turbocharging or supercharging, you need pistons that can handle the extreme cylinder pressures. JE Pistons' Ultra Series are designed precisely for these demanding applications. They're not just off-the-shelf parts; they incorporate features usually found only in custom racing pistons, all made right here in the USA.

What sets these Ultra Series pistons apart is JE's proprietary Aligned Grain Flow forging technology. This process maximizes the tensile strength of the aluminum, making them incredibly strong to resist the stresses of high-boost builds. You'll also find a thermal barrier crown coating, which is a ceramic-based material that reflects heat back into the combustion chamber. This helps keep piston crown temperatures down and can improve how efficiently exhaust gases are scavenged. The pistons also come with a skirt coating that reduces friction and wear on the cylinder walls, which can also lead to quieter operation, especially when the engine is cold. For maintaining a solid ring seal under high RPM and boost, lateral gas ports are included, helping to keep that crucial compression where it belongs.

This set includes four pistons, each with a 3.445-inch (87.5mm) bore and a 10.0:1 compression ratio, designed to fit your Honda K20A engine. They also come with high-strength Trend Performance wrist pins, known for their durability in performance applications. Remember, these pistons are not CARB approved and cannot be shipped to California. If you're aiming for serious power with your K20A, these pistons are a well-built foundation.