JE Pistons Ultra Series GM Gen V LT1 4.07in Bore/4in Stroke Set of 8 Pistons

JE Pistons is well-known for making some of the strongest, most feature-packed pistons you can get right off the shelf. This set of Ultra Series pistons is built specifically for GM Gen V LT1 engines, designed to handle the intense cylinder pressures that come with serious power adder builds, whether you're running boost or nitrous. They are made 100% in the USA, ensuring top-notch manufacturing right here at home.

What really sets these Ultra Series pistons apart is their proprietary Aligned Grain Flow forging technology. This process maximizes the material's tensile strength, making them incredibly robust for high-performance engine environments. 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 reduce piston crown temperatures and can improve how exhaust gases are scavenged. For reduced friction and wear on the piston skirts and cylinder walls, a special skirt coating is applied, which also helps quiet down the engine, especially during cold starts. These pistons also feature lateral gas ports to help maintain a solid ring seal, even at high RPMs and under significant boost pressure.

Included with these pistons are high-strength, thick-wall wrist pins from Trend Performance, built to handle the demands of power-adder applications. The pin oiling has been optimized to keep the pin, bores, and small-end well-lubricated, further reducing heat, friction, and wear. This entire package is designed for high-horsepower racing engines, making these pistons a solid choice for your next V8 build. Please note that these pistons are not CARB approved and cannot be shipped to California.