JE Pistons GM LS ASYM FSR Flat Top 3.900 STRK 4.010 Bore - Set of 8

If you're building a high-performance GM LS engine, getting the right pistons is crucial for durability and power. This set of eight JE Pistons is designed specifically for LS engines, featuring a 4.010-inch bore and a flat-top design that works well with various compression ratios. They are forged from 2618 aluminum, a material known for its high tensile strength, which is exactly what you need when you're pushing an engine hard.

JE Pistons has been in the game for over 75 years, and they build these right here in the USA. The Asymmetrical Forged Side Relief (FSR) design is a notable feature; it means the piston has a reduced skirt width and uses a shorter wrist pin. This combination helps minimize friction and power loss, while also saving weight. Depending on the specific application, these pistons might also come with an accumulator groove to help manage combustion gases, improving ring seal and preventing flutter. Some applications also include a skirt coating to further reduce friction and wear, which can also quiet down the engine operation.

This set includes everything you need to outfit an 8-cylinder LS engine. Remember, these are not CARB approved and cannot be shipped to California. If you're serious about your LS build, these pistons are a solid choice for performance and reliability.