JE Pistons 345617S Forged 2618 Dome Piston Single 3.386" Bore

The JE Pistons 345617S is a single forged racing piston crafted from 2618 aluminum alloy, engineered for high-performance and competition applications. Featuring a dome top design, this piston is built to optimize compression in boosted or high-compression naturally aspirated engine builds.

Key Specifications:

• Alloy: 2618 Forged Aluminum
• Top Profile: Dome
• Bore Diameter: 3.386 in.
• Compression Distance (CD): 1.185 in.
• Pin Diameter: 0.827 in.

JE Pistons uses 2618 aluminum alloy — a material known for superior impact resistance and toughness under extreme heat and detonation, making it the preferred choice for forced induction, nitrous, and all-out racing applications. This alloy is slightly softer than 4032 but offers greater durability under shock loads, making it ideal for high-boost and high-RPM environments.

Backed by over 70 years of in-house forging expertise and industry-leading manufacturing technology, JE Pistons are trusted at the top levels of drag racing, road racing, circle track, and off-road motorsports. Each piston is precision-machined to exacting tolerances for consistent performance and long service life.