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JE Pistons

The origins of what we know today as JE Pistons can be traced back to 1912 and the Los Angeles foundry of William Jahns Sr. and his company W.H. Jahns. Employing the tagline, “Nothing but Pistons,” the W.H. Jahns company produced pistons and semi-finished pistons until 1948, when Jahns Sr. retired. Meanwhile, Jahns’ son, William “Uncle Bill” Jahns Jr., started and had been working on his company Jahns’ Racing Pistons since 1947. Shortly after, the business became Jahns’ Engineering Pistons, and was finally shortened to JE Pistons.

Through the following years, JE Pistons’ technology evolved, from mastering casting technology in the 60s to researching and implementing forging technology in the 70s. Numerical Controlled (NC) machines were introduced to manufacturing in the early 80s, which was quickly improved to the use of Computer Numerical Controlled (CNC) machines and a proprietary piston design and machining program in the mid-80s.

JE Pistons has continued to evolve their manufacturing processes, currently offering racing pistons either off the shelf or fully custom. JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE’s 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.

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JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324719L
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Kit Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Kit

$449.99
JEP324719
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over...
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324718R
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324718L
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Kit Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Kit

$449.99
JEP324718
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over...
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324717R
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324717L
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Kit Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Kit

$449.99
JEP324717
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over...
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324716R
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324716L
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
JE Pistons HARLEY Twin Cam 95 Piston Kit Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Kit

$449.99
JEP324716
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over...
JE Pistons HARLEY Twin Cam 95 Piston Single Quick View
JE Pistons

JE Pistons HARLEY Twin Cam 95 Piston Single

$299.99
JEP324715R
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons HARLEY Twin Cam 95 Piston Single
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