JE Pistons GM LS 4.130in Bore 1.115 CD -12.40cc Dish/Inverted Dome - Set of 8

This is a set of eight forged pistons from JE Pistons, designed for GM LS engines. You get the pistons themselves, ready to be installed in your build. These aren't just any pistons; they're forged from 2618 aluminum, a material known for its high tensile strength, which is crucial for engines pushed hard in racing or high-performance street applications. JE Pistons has been making these kinds of parts for over 75 years, and they're all made right here in the USA.

What sets these pistons apart is their specific design for the GM LS engine. They feature a 4.130-inch bore size and a -12.40cc dish or inverted dome shape, which affects your compression ratio. JE also uses a proprietary Forged Side Relief (FSR) forging design. This means they've worked to reduce skirt width and use a shorter wrist pin, which helps minimize friction and power loss while also saving weight. Depending on the specific application, some pistons might also come with an accumulator groove to help reduce combustion gas pressure and improve ring seal, and a skirt coating to further cut down on friction and noise.

If you're building a performance LS engine, whether for the track or just serious street use, these pistons are a solid option. They're built to handle the demands of high-performance engines and are made entirely in the USA. Keep in mind these are not CARB approved and cannot be shipped to California.