Manufacturing of spark plugs (all types)

505 FACILITIES

Facility	City	State	Employees	Status
Defense and Systems Vandalia OH	Vandalia	OH	100–499	LIKELY ACTIVE
Denso Manufacturing Tennessee, Inc.- DLNT	Mount Juliet	TN	100–499	LIKELY ACTIVE
Diamond Electric WV	Eleanor	WV	100–499	LIKELY ACTIVE
Elc Industries CORP.	Aurora	IL	—	LIKELY ACTIVE
Electronixiq INC	Avondale Estates	GA	—	LIKELY ACTIVE
Enhanced Manufacturing solutions (AL)	Gadsden	AL	1–19	LIKELY ACTIVE
Evfsc, LLC	Whitehall	MI	—	LIKELY ACTIVE
EvoCharge, Inc.	Eden Prairie	MN	1–19	LIKELY ACTIVE
Ev West INC.	San Marcos	CA	—	LIKELY ACTIVE
Exeter Site	Exeter	RI	1–19	LIKELY ACTIVE
Federal Mogul	El Paso	TX	100–499	LIKELY ACTIVE
Freistadt	Germantown	WI	100–499	LIKELY ACTIVE
Gregory Thomas INC	Yorkville	IL	—	LIKELY ACTIVE
GSW Manufacturing, Inc. Findlay	Findlay	OH	20–99	LIKELY ACTIVE
Hitachi Astemo Americas Inc. Harrodsburg Ky Plant	Harrodsburg	KY	500+	LIKELY ACTIVE
Holley Inc. - AEM/Simpson	Hawthrone	CA	20–99	LIKELY ACTIVE
Holley Inc. - MSD	El Paso	TX	100–499	LIKELY ACTIVE
Holley Inc. - Speartech	Anderson	IN	1–19	LIKELY ACTIVE
Holley Inc. - Tuning Group Sanford	Sanford	FL	20–99	LIKELY ACTIVE
Holley Tuning Group - OG	Ogden	UT	20–99	LIKELY ACTIVE
Holley Tuning Group - OP	Opelika	AL	20–99	LIKELY ACTIVE
In-mar Solutions LLC	Gonzales	LA	—	LIKELY ACTIVE
In Mar Systems INC	Gonzales	LA	—	LIKELY ACTIVE
Jsa Exchange LLC	Sheridan	WY	—	LIKELY ACTIVE
Julian Electric Inc.	Lockport	IL	100–499	LIKELY ACTIVE
Kempower Inc.	Durham	NC	100–499	LIKELY ACTIVE
Kenco Or LLC	Goodyear	AZ	—	LIKELY ACTIVE
Kokomo Components	Kokomo	IN	100–499	LIKELY ACTIVE
Kwangjin America, Inc.	Warren	MI	100–499	LIKELY ACTIVE
Lawrence Technologies INC	Dayton	OH	—	LIKELY ACTIVE
Lear Corporation - Building 200	Southfield	MI	20–99	LIKELY ACTIVE
Lear Corporation - Plymouth	Plymouth	IN	20–99	LIKELY ACTIVE
Marelli	Smyrna	TN	100–499	LIKELY ACTIVE
Marelli NA	Canton	MS	100–499	LIKELY ACTIVE
Mercury Marine Plant 7 - St. Cloud, FL	Saint Cloud	FL	100–499	LIKELY ACTIVE
Michigan Office	Plymouth	MI	20–99	LIKELY ACTIVE
Mitsubishi Electric Automotive Inc.	Maysville	KY	100–499	LIKELY ACTIVE
Modal Motors INC	Farmington Hills	MI	—	LIKELY ACTIVE
Motec USA INC	Mooresville	NC	—	LIKELY ACTIVE
Motor Components, LLC	Elmira Heights	NY	20–99	LIKELY ACTIVE
Nal Corporate Headquarters	Paris	IL	100–499	LIKELY ACTIVE
Nal Flora Plant	Flora	IL	500+	LIKELY ACTIVE
Nal Illinois Equipment Plant	Flora	IL	20–99	LIKELY ACTIVE
Nal Mattoon Service Plant	Mattoon	IL	20–99	LIKELY ACTIVE
Nal Muscle Shoals Plant	Muscle Shoals	AL	500+	LIKELY ACTIVE
Nal Paris Plant	Paris	IL	500+	LIKELY ACTIVE
Nal Salem Plant	Salem	IL	500+	LIKELY ACTIVE
Nal Technical Center	Farmington Hills	MI	100–499	LIKELY ACTIVE
Nashville Customer Service Center	Antioch	TN	100–499	LIKELY ACTIVE
Nidec Mobility of America Corporation	Saint Charles	IL	100–499	LIKELY ACTIVE

FactoryRegistry lists 505 facilities whose primary industry classification is one of the 1 industry above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced spark plugs (all types), in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.

The U.S. Census Bureau recorded this product line in 1 US manufacturing industry in the 2022 Economic Census, as the most specific line that industry reported, and withheld the establishment count for it.

These are counts of establishments by industry: the Economic Census publishes them as industry totals and never as a list of plants.

Part of Manufacturing of aircraft propellers and helicopter rotors, including blades and parts

Manufacturing of aircraft engine instruments, excluding flight Manufacturing of aircraft mechanical power transmission equipment for civilian and military aircraft

Industries

Transportation Equipment Manufacturers All product lines

NAPCS collection code 2029575000. Source for the product line, the establishment counts and the shares: U.S. Census Bureau, 2022 Economic Census (ECNNAPCSIND2022). Federal source data is public domain. Facility records are compiled separately by FactoryRegistry and carry their own sources.