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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 Polaris RZR XP900 93MM 12.0 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 12.0 to 1 Piston Kit

$634.99
JEP363683
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 Polaris RZR XP900 93MM 11.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 11.5 to 1 Piston Single

$364.99
JEP363682S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP900 93MM 11.5 to 1 Piston Single
JE Pistons Polaris RZR XP900 93MM 11.5 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 11.5 to 1 Piston Kit

$634.99
JEP363682
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 Polaris RZR XP900 93MM 11.0 to 1 Piston Single Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 11.0 to 1 Piston Single

$364.99
JEP363681S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP900 93MM 11.0 to 1 Piston Single
JE Pistons Polaris RZR XP900 93MM 11.0 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 11.0 to 1 Piston Kit

$634.99
JEP363681
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 Polaris RZR XP900 93MM 10.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 10.5 to 1 Piston Single

$364.99
JEP363680S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP900 93MM 10.5 to 1 Piston Single
JE Pistons Polaris RZR XP900 93MM 10.5 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 10.5 to 1 Piston Kit

$634.99
JEP363680
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 Polaris RZR XP900 93MM 9.0 to 1 Piston Single Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 9.0 to 1 Piston Single

$364.99
JEP363679S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP900 93MM 9.0 to 1 Piston Single
JE Pistons Polaris RZR XP900 93MM 9.0 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Polaris RZR XP900 93MM 9.0 to 1 Piston Kit

$634.99
JEP363679
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 2019 KX450 96MM 13.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons 2019 KX450 96MM 13.5 to 1 Piston Single

$364.99
JEP362956S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2019 KX450 96MM 13.5 to 1 Piston Single
JE Pistons 2019 KX450 96MM 13.5 to 1 Piston Kit Quick View
JE Pistons

JE Pistons 2019 KX450 96MM 13.5 to 1 Piston Kit

$309.99
JEP362956
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 2019 KX450 96MM 12.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons 2019 KX450 96MM 12.5 to 1 Piston Single

$364.99
JEP362955S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2019 KX450 96MM 12.5 to 1 Piston Single
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