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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 CRF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Kit

$329.99
JEP315161
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...
JE Pistons Honda CRF450 PRO Piston Single Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Single

$374.99
JEP315160S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Honda CRF450 PRO Piston Single
JE Pistons Honda CRF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Kit

$329.99
JEP315160
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons Honda CRF450 PRO Piston KitThis Part Fits: Year Make Model Submodel 2013-2016 Honda CRF450R Base
JE Pistons Honda CRF450 PRO Piston Single Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Single

$374.99
JEP315159S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Honda CRF450 PRO Piston Single
JE Pistons Honda CRF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Kit

$329.99
JEP315159
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons Honda CRF450 PRO Piston KitThis Part Fits: Year Make Model Submodel 2013-2016 Honda CRF450R Base
JE Pistons Honda CRF450 PRO Piston Single Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Single

$374.99
JEP315158S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Honda CRF450 PRO Piston Single
JE Pistons Honda CRF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons Honda CRF450 PRO Piston Kit

$329.99
JEP315158
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...
JE Pistons 660 Yamaha Raptor 5V Piston Single Quick View
JE Pistons

JE Pistons 660 Yamaha Raptor 5V Piston Single

$349.99
JEP314758S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 660 Yamaha Raptor 5V Piston Single
JE Pistons 660 Yamaha Raptor 5V Piston Kit Quick View
JE Pistons

JE Pistons 660 Yamaha Raptor 5V Piston Kit

$309.99
JEP314758
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 KTM 250SXF 13.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons KTM 250SXF 13.5 to 1 Piston Single

$349.99
JEP312479S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons KTM 250SXF 13.5 to 1 Piston Single
JE Pistons KTM 250SXF 13.5 to 1 Piston Kit Quick View
JE Pistons

JE Pistons KTM 250SXF 13.5 to 1 Piston Kit

$309.99
JEP312479
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 Subaru EJ Series 99.52 mm Bore 1.209 In CH -7.00 CC - Single Right Piston JE Pistons Subaru EJ Series 99.52 mm Bore 1.209 In CH -7.00 CC - Single Right Piston Quick View
JE Pistons

JE Pistons Subaru EJ Series 99.52 mm Bore 1.209 In CH -7.00 CC - Single Right Piston

$299.99
JEP310936R
Engine Components JE Pistons Pistons - Forged - Single
Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applicationsDesigned specifically for each engine and use application to...
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