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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 Honda CBR 250R Piston Single Quick View
JE Pistons

JE Pistons Honda CBR 250R Piston Single

$364.99
JEP308446S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Honda CBR 250R Piston Single
JE Pistons Honda CBR 250R Piston Kit Quick View
JE Pistons

JE Pistons Honda CBR 250R Piston Kit

$314.99
JEP308446
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons...
JE Pistons Harley-Davidson Twin Cam FSR 103in Piston Single Quick View
JE Pistons

JE Pistons Harley-Davidson Twin Cam FSR 103in Piston Single

$299.99
JEP308444S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Harley-Davidson Twin Cam FSR 103in Piston Single
JE Pistons Harley-Davidson Twin Cam FSR 103in Piston Kit Quick View
JE Pistons

JE Pistons Harley-Davidson Twin Cam FSR 103in Piston Kit

$469.99
JEP308444
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 Sea-Doo RXP 100.5MM Piston Single Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Single

$309.99
JEP308440S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Sea-Doo RXP 100.5MM Piston Single
JE Pistons Sea-Doo RXP 100.5MM Piston Kit Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Kit

$789.99
JEP308440
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged powersports...
JE Pistons Sea-Doo RXP 100.5MM Piston Single Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Single

$309.99
JEP308439S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Sea-Doo RXP 100.5MM Piston Single
JE Pistons Sea-Doo RXP 100.5MM Piston Kit Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Kit

$789.99
JEP308439
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged powersports...
JE Pistons Sea-Doo RXP 100.5MM Piston Single Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Single

$309.99
JEP308438S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Sea-Doo RXP 100.5MM Piston Single
JE Pistons Sea-Doo RXP 100.5MM Piston Kit Quick View
JE Pistons

JE Pistons Sea-Doo RXP 100.5MM Piston Kit

$789.99
JEP308438
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged powersports...
JE Pistons Sea-Doo RXP 10.0 100M Piston Single Quick View
JE Pistons

JE Pistons Sea-Doo RXP 10.0 100M Piston Single

$309.99
JEP308434S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Sea-Doo RXP 10.0 100M Piston Single
JE Pistons Sea-Doo RXP 10.0 100M Piston Kit Quick View
JE Pistons

JE Pistons Sea-Doo RXP 10.0 100M Piston Kit

$789.99
JEP308434
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged powersports...
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