What Piston Group makes

Piston Group is a Southfield, Michigan automotive supplier built around value-add assembly: it sequences and assembles automotive modules and systems, then delivers them to vehicle assembly plants, often in the exact build order the line needs. The group operates through three companies. Piston Automotive handles module and system assembly across electrical and battery, powertrain and cooling, interior, exterior, and chassis systems, with in-house process engineering, advanced assembly, supply-chain management, and prototype testing. The company describes itself as the world's largest value-add assembly supplier, a self-claim rather than an audited ranking. Piston Interiors designs, engineers, and manufactures automotive interior components, fabrics, and accessories. Detroit Thermal Systems (DTS) develops and manufactures climate-control (HVAC) systems and components.

Value-add assembly sits close to the OEM line. As a Tier 1 integrator, Piston takes components from many upstream suppliers, builds them into finished modules such as instrument panels, front-end modules, and thermal assemblies, and ships them just-in-time and in-sequence. That work rewards disciplined supply-chain management and quality systems more than raw component fabrication, which is reflected in how the company positions its engineering and logistics capabilities.

Financial performance

Piston Group is privately held and does not publish audited financial statements, but the company discloses a revenue trajectory on its own materials: from roughly $1 million at its 1996 founding to about $3.4 billion in 2023, $3.1 billion in 2024, and a projected $3 billion in 2025. The company reports more than 10,000 team members across the United States, Mexico, and Canada, and 21 facilities. Vinnie Johnson describes Piston Group as the largest minority-owned manufacturing company in North America. Because margin and balance-sheet data are not published, this profile reports the disclosed revenue, headcount, and facility figures as company statements and does not assign a financial-resilience grade.

Ownership and history

Vinnie Johnson founded Piston Group in 1996 after a professional basketball career that included two NBA championships with the Detroit Pistons in 1989 and 1990. He grew the business from a single investment into a diversified manufacturing group that today includes Piston Automotive, Piston Interiors, and Detroit Thermal Systems. Johnson remains Founder and Chairman, and he resumed the CEO role in June 2026 after Mamadou Diallo, a former American Honda senior vice president who had been CEO since June 2024, departed. Day-to-day leadership per the company's own materials includes Bob Holloway, promoted to Chief Operating Officer in December 2023; Jana Rosenmann, named President of Piston Automotive in April 2024; and Dan Lee, appointed Chief Financial Officer in July 2025. The company has been recognized by Crain's Detroit as the region's largest minority-owned business and by FCA (now Stellantis) as Minority Business Enterprise of the Year, and it holds NMSDC Corporate Plus member status.

Certifications and quality

Piston Group reports quality-system certifications across its operations, including IATF 16949, ISO 9001, and ISO 14001. Detroit Thermal Systems is IATF 16949 and ISO 14001 certified and earned Ford Motor Company's Q1 designation, Ford's highest supplier quality recognition, in May 2017. DTS describes using poka-yoke error-proofing and camera-vision inspection to verify component placement and orientation, standard practice for a supplier running high-volume PPAP-governed OEM programs. These certifications are self-reported at the group level across multiple sites and are presented here as company claims.

Known customers

Piston Group's customer base is documented through company materials and major-outlet coverage:

A 2016 industry announcement additionally listed ZF among Piston Group customers.

Sourcing evidence

Piston Automotive's US import record reads like an assembler pulling finished automotive components from established Tier 1 and OEM plants abroad. US customs bill-of-lading data shows 1,201 sea shipments from January 2015 through September 2026, with the most recent on September 19, 2026, averaging about 19 TEU per month. The named foreign suppliers are automotive manufacturers, not trading intermediaries:

The origin mix is European, led by Spain and Turkey, with the United Kingdom and Portugal also present. The goods, structural stampings, exterior parts, battery bases, and lithium-ion accumulators, are components that feed into assembled modules, consistent with a value-add assembler rather than a parts reseller. Customs-derived estimates put cumulative ocean shipping spend at roughly $2.3 million with cost data covering about 55% of shipments, an order-of-magnitude figure rather than an audited one. This aligns with buyers weighing nearshoring and tariff exposure on transatlantic component flows, especially given Piston's own manufacturing footprint in Mexico.

Coverage caveats: these are US ocean-freight records only. Air, truck, and rail movements, including most US-Mexico flows to and from Piston's Acuna, Sabinas, and Gomez Palacio plants, do not appear. Some records name freight intermediaries rather than manufacturers, and product categories come from declared manifest codes, which are noisy. Absence of a record is not evidence of absence.

Frequently asked questions

What does Piston Group make?

Piston Group is a value-add assembly supplier that sequences and assembles automotive modules and systems for vehicle manufacturers. Through Piston Automotive it builds electrical and battery, powertrain and cooling, interior, exterior, and chassis assemblies; through Piston Interiors it makes automotive interior components; and through Detroit Thermal Systems it makes climate-control (HVAC) systems and components.

Who owns Piston Group?

Piston Group is privately held and was founded in 1996 by Vinnie Johnson, a two-time NBA champion with the Detroit Pistons. Johnson is Founder, Chairman, and, since June 2026, CEO. The company describes itself as the largest minority-owned manufacturing company in North America.

What is Piston Group's revenue?

Piston Group reports annual revenue of about $3 billion. Its own materials show a trajectory from roughly $1 million at its 1996 founding to about $3.4 billion in 2023 and $3.1 billion in 2024. As a private company it does not publish audited financial figures.

Where is Piston Group headquartered?

Piston Group's corporate headquarters is at 3000 Town Center, Suite 3250, Southfield, Michigan 48075. The group operates 21 facilities across Michigan, Ohio, Kentucky, Missouri, Texas, Ontario in Canada, and several plants in Mexico. Piston Automotive's plant in Redford, Michigan is one of its Michigan sites.

Who are Piston Group's customers?

Piston Group names Ford, General Motors, Stellantis (FCA), Toyota, and Honda as customers on its own materials, and a 2016 industry announcement also listed ZF. Detroit Thermal Systems holds Ford's Q1 quality certification, and a GM-linked entity appears in US customs records.

What certifications does Piston Group hold?

Piston Group reports IATF 16949, ISO 9001, and ISO 14001 certifications across its operations. Detroit Thermal Systems is IATF 16949 and ISO 14001 certified and earned Ford's Q1 designation in 2017. These are self-reported at the group level across multiple sites.

Last verified September 28, 2026. Is this your company? Request a correction.