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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 SUB STI EJ257 Block w/ EJ20 Head 99.75mm Bore CR 8.5 KIT Set of 4 Pistons JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.75mm Bore CR 8.5 KIT Set of 4 Pistons Quick View
JE Pistons

JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.75mm Bore CR 8.5 KIT Set of 4 Pistons

$899.99
JEP296349
Engine Components JE Pistons Piston Sets - Forged - 4cyl
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 Ring Sets 1.0-1.2-2.8-3.405 Quick View
JE Pistons

JE Pistons Ring Sets 1.0-1.2-2.8-3.405

$183.99
JEPJG1004-3405
Engine Components JE Pistons Piston Rings
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 1.0-1.2-2.8-3.250 Quick View
JE Pistons

JE Pistons Ring Sets 1.0-1.2-2.8-3.250

$41.99
JEPJG1001-3250
Engine Components JE Pistons Piston Rings Under 100
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons FORD ZETEC 2.0KIT Set of 4 Pistons JE Pistons FORD ZETEC 2.0KIT Set of 4 Pistons Quick View
JE Pistons

JE Pistons FORD ZETEC 2.0KIT Set of 4 Pistons

$899.99
JEP298716
Engine Components JE Pistons Piston Sets - Forged - 4cyl
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 BMW S52B32US 9:1 KIT Set of 6 Pistons JE Pistons BMW S52B32US 9:1 KIT Set of 6 Pistons Quick View
JE Pistons

JE Pistons BMW S52B32US 9:1 KIT Set of 6 Pistons

$1,324.99
JEP297171
Engine Components JE Pistons Piston Sets - Forged - 6cyl
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 VW R32 24V 85M KIT Set of 6 Pistons JE Pistons VW R32 24V 85M KIT Set of 6 Pistons Quick View
JE Pistons

JE Pistons VW R32 24V 85M KIT Set of 6 Pistons

$1,324.99
JEP279951
Engine Components JE Pistons Piston Sets - Forged - 6cyl
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 Ring Sets 1.0-1.0-2.0-3.268 Quick View
JE Pistons

JE Pistons Ring Sets 1.0-1.0-2.0-3.268

$33.99
JEPXG8300
Engine Components JE Pistons Piston Rings Under 100
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 0.8-0.8-1.5-2.717 Quick View
JE Pistons

JE Pistons Ring Sets 0.8-0.8-1.5-2.717

$30.99
JEPXA6900
Engine Components JE Pistons Piston Rings Under 100
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 1.2 / 1.2 / 2.5 Subaru EJ257 Block w/EJ20 Head Quick View
JE Pistons

JE Pistons Ring Sets 1.2 / 1.2 / 2.5 Subaru EJ257 Block w/EJ20 Head

$183.99
JEPJG4904-3937
Engine Components JE Pistons Piston Rings
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 99.75 Bore 79 Stroke 130.5mm 30.7mm C/D -17.0 Dome 405 Quick View
JE Pistons

JE Pistons Ring Sets 99.75 Bore 79 Stroke 130.5mm 30.7mm C/D -17.0 Dome 405

$183.99
JEPJG4904-3927
Engine Components JE Pistons Piston Rings
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 99.5 79 130.5 30.7 57.0 8.5:1 -16.5 407 TF Quick View
JE Pistons

JE Pistons Ring Sets 99.5 79 130.5 30.7 57.0 8.5:1 -16.5 407 TF

$183.99
JEPJG4904-3917
Engine Components JE Pistons Piston Rings
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
JE Pistons Ring Sets 100 79 130.5 30.7 57.0 9.5:1 -7.6 427 TMF (For Single Piston) Quick View
JE Pistons

JE Pistons Ring Sets 100 79 130.5 30.7 57.0 9.5:1 -7.6 427 TMF (For Single Piston)

$45.99
JEPJG4901-3937
Engine Components JE Pistons Piston Rings Pistons - Forged - Single Under 100
JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various...
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