JE Pistons BMW N54B30 Ultra Series Set of 6 Pistons Inv Dome/Dish 3.307 Bore 1.275 CD 0.866 Dia

If you're rebuilding the engine in your BMW N54B30, especially for a high-boost application, JE Pistons' Ultra Series forged pistons are a solid choice. These aren't your average replacement pistons; they're built from the ground up to handle the intense pressures and heat generated by serious performance builds. JE Pistons has packed these with features typically 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 material's tensile strength, making them incredibly strong and ready for the demands of boosted engines. They also come with a thermal barrier crown coating, which is a ceramic-based layer that reflects heat back into the combustion chamber. This helps keep the piston crown cooler and can improve how efficiently exhaust gases are scavenged. For reduced friction and wear on both the piston skirts and cylinder walls, a special skirt coating is applied, which also helps quiet down operation, especially when the engine is cold. To ensure everything stays well-lubricated under extreme conditions, these pistons feature enhanced pin oiling, and they include high-strength wrist pins from Trend Performance, designed specifically for high-performance builds.

Beyond the core strength and lubrication, these pistons also incorporate lateral gas ports. These ports help maintain a strong seal for the top compression ring, even when you're dealing with high RPMs and significant boost pressure. This attention to detail ensures consistent power delivery and helps protect your engine. This set includes six pistons, each with an inverted dome/dish design, a 3.307-inch bore, and a 0.866-inch pin diameter, designed to achieve a 9.50:1 compression ratio. Please note that these pistons are not CARB approved and cannot be shipped to California.