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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

JE Pistons KTM 250SX-F PRO SERIES 14.5 Piston Kit

$299.99
JEP366506
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 range of Pro Series pistons. Pro...
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 12.0 to 1 Piston Single

$364.99
JEP363688S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP 1000 93MM 12.0 to 1 Piston Single
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 12.0 to 1 Piston Kit

$634.99
JEP363688
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...
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 11.5 to 1 Piston Single

$364.99
JEP363687S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP 1000 93MM 11.5 to 1 Piston Single
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 11.51 Piston Kit

$634.99
JEP363687
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...
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 11 to 1 Piston Single

$364.99
JEP363686S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP 1000 93MM 11 to 1 Piston Single
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 11 to 1 Piston Kit

$634.99
JEP363686
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...
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 10.5 to 1 Piston Single

$364.99
JEP363685S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP 1000 93MM 10.5 to 1 Piston Single
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 10.5 to 1 Piston Kit

$634.99
JEP363685
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...
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 9.5 to 1 Piston Single

$364.99
JEP363684S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP 1000 93MM 9.5 to 1 Piston Single
Quick View
JE Pistons

JE Pistons Polaris RZR XP 1000 93MM 9.5 to 1 Piston Kit

$634.99
JEP363684
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 12.0 to 1 Piston Single Quick View
JE Pistons

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

$364.99
JEP363683S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Polaris RZR XP900 93MM 12.0 to 1 Piston Single
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