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Last updated: January 2026
This directory lists 48 automotive parts manufacturers across the United States, from prototype specialists and low-volume custom fabricators to high-volume Tier 1 component producers.
Buyers in this space are typically solving for critical issues such as mitigating single-source risk, achieving aggressive cost-down targets on legacy components, or accelerating new product introduction for electric vehicle platforms. They require suppliers capable of handling complex geometries, specialized materials, and stringent quality gates like IATF 169949 compliance, ensuring robust Process Failure Mode and Effects Analysis (PFMEA) and reliable statistical process control (SPC) data.
The range of supplier types is vast: you'll find precision machining houses specializing in engine components, stamping and forming experts for body-in-white structures, plastics molders for interior and exterior trim, and even complete assembly specialists. Some focus on Build-to-Print (BTP) models, executing your precise designs, while others offer 'Black Box' or 'Grey Box' engineering services, contributing significantly to component design based on your functional specifications.
To ensure a smooth engagement, buyers should arrive with detailed GD&T (Geometric Dimensioning and Tolerancing) drawings, clear material specifications, annual volume forecasts with ramp-up curves, and critical timeline milestones, especially for PPAP submission. Suppliers, in turn, expect design stability, transparent communication, and a clear understanding of the project's quality and performance targets.
48 companies nationwide
Advanced Plastiform, Inc. is a custom plastic manufacturer specializing in thermoforming and injection molding for the automotive industry. They produce high-quality plastic parts for car production, offering services like vacuum forming, pressure forming, twin-sheet forming, CNC and robotic trimming, and value-added assembly.
Based in Hudson, FL, American Car Craft specializes in manufacturing aftermarket automotive parts. The company emphasizes craftsmanship, producing parts made in the USA using stainless steel. They cater to car enthusiasts seeking unique and high-quality accessories for their vehicles, focusing on in-house production.
Based in Gurnee, IL, American Industrial Company (AIC) is a single-source manufacturer with over 30 years of experience in precision metal stamping, laser cutting, and secondary services. AIC produces high-quality metal stamped aftermarket car parts, serving the automotive, appliance, hardware, construction, and electronics industries.
Based in Swansea, SC, American Tool & Die specializes in precision tool and die manufacturing, custom metal fabrication, and stamping. They offer CNC machining, wire EDM, and automation solutions, primarily serving the automotive, aerospace, and heavy equipment industries. The company delivers durable, tailored components and engineering expertise.
Based in Chino, CA, Aranda Tooling, LLC is an ISO 9001:2015 certified provider of automotive and custom metal stamping services. Specializing in high-volume, complex metal stamping up to 1320 tons, the company also offers in-house metal fabrication, tool and die design, and robotic welding and assembly.
Based in San Jose, CA, Atech Manufacturing provides high-precision CNC machining solutions. They produce prototypes to production quantity runs using traditional metals, specialized alloys, and industrial plastics. Serving diverse sectors, their expertise extends to the automotive, semiconductor, medical, aerospace, defense, robotics, and optic device industries.
Based in Fremont, CA, Bart Manufacturing specializes in precision machining services. They provide CNC machining, CNC prototyping, vertical milling, and CNC lathe operations. The company also offers comprehensive contract manufacturing solutions for clients requiring custom fabricated parts.
Dye CNC is a San Diego, CA-based machine shop specializing in complex, tight tolerance parts for the automotive, aerospace, defense, and medical industries. They provide CNC turning and milling with 3, 4, and 5 Axis capabilities. The company holds AS9100, ISO9000, and ITAR certifications for quality manufacturing.
Independence Precision Machining, LLC, based in Roseville, CA, offers precision CNC machining, prototype manufacturing, and production services. They utilize advanced turning and milling equipment, working with materials like steel, aluminum, and titanium. The company is AS9100D and ISO 9001:2015 certified.
Based in Fenton, MO, Koller Craft specializes in injection molded plastic automotive components. The company adheres to stringent industry standards, ensuring high-quality manufacturing solutions for its clients. They are dedicated to exceeding expectations with precision plastic parts for the automotive sector.
Based in Northridge, CA, Maroney Company, LLC specializes in ultra-precision and low-tolerance machining services. They offer electrical discharge machining, grinding, milling, and turning for intricate machine parts and complex projects. Certified AS9100 and ISO 9001, Maroney serves demanding industrial clients.
Based in Pasadena, CA, Monaco Motorsports manufactures and designs carbon fiber and performance aftermarket parts. The company specializes in components for BMW, Audi, Mercedes, Tesla, and Toyota Supra models, offering products like trunk spoilers, mirror covers, exhaust tips, and interior trims.
MW Components, based in Charlotte, NC, manufactures precision metal components primarily for electric car applications, including battery contacts and fasteners. With over 20 US-based facilities, they produce custom and stock items like springs, bellows, and shims, providing reliable manufacturing and engineering support for the automotive sector.
Overtake is an aftermarket automotive parts manufacturer specializing in high-performance components for Subaru vehicles and the Toyota GR86. Founded by Justin Grimm, the company has over 20 years of experience, producing turbo inlets, intercoolers, and air filters with a focus on quality and community engagement.
Polymershapes manufactures and supplies plastic components specifically for the automotive industry. The company produces durable, cost-effective plastic parts, leveraging its expertise to provide essential components for various automotive applications.
Based in Riverside, CA, Price Manufacturing Company specializes in precision screw machine and CNC machining services. They provide custom aluminum and other machined parts, acting as a production partner for businesses. Capabilities include contract manufacturing for diverse industry needs.
Based in Pomona, CA, Private Label MFG specializes in developing, manufacturing, and supplying high-quality aftermarket performance parts for the automotive industry. The company produces a range of car performance components, including various engine parts, operating as a direct manufacturer for clients.
Based in Seattle, WA, Quickparts provides manufacturing services for the automotive industry. They offer premium prototypes, custom parts, and production tools, supporting both low-quantity and high-volume needs. With 35 years of experience, Quickparts is ISO 9001:2015 certified.
Based in Minerva, OH, Regal Metal Products Company specializes in precision metal stamping for the automotive, agriculture, appliance, and heavy truck industries. They offer engineering, prototyping, tooling, production, and assembly services, and are ISO 9001 certified.
RevPart provides rapid prototyping and manufacturing services, guiding products from concept to production. They specialize in 3D printing, CNC machining, injection molding, urethane casting, and custom silicone molding. Serving automotive, medical, aerospace, and industrial sectors, RevPart delivers prototype, short-run, and production parts.
Reyes Automotive Group, based in San Antonio, TX, is a Tier 1 onsite supplier for Toyota Motor Manufacturing Texas. Established in 2005, it specializes in plastic blow molding and injection molding, producing interior and exterior plastic automotive components. They operate 28 injection molding and 3 blow molding presses.
RzEV specializes in manufacturing performance parts and accessories specifically for Electric Vehicles (EVs). The company offers a range of suspension and styling components designed to enhance EV performance and aesthetics.
SeaGate Plastics, based in Toledo, OH, manufactures high-quality plastic components for automotive, industrial, and OEM industries. Capabilities include extrusion, injection molding, CNC machining, fabrication, and assembly. With facilities in Ohio and Michigan, they provide durable plastic solutions.
Based in Long Island City, NY, Standard Motor Products, Inc. manufactures and distributes premium replacement parts for the automotive aftermarket. The company specializes in engine management, temperature control, and wire & cable products, leveraging extensive engineering and manufacturing capabilities. They serve automotive service professionals throughout North America.
Based in Carson, CA, Stealth EV provides high-quality electric vehicle parts for the automotive industry. Their products undergo rigorous testing to ensure exceptional durability and performance, meeting the demanding standards of EV applications.
Based in Georgetown, TX, Texas Speed and Performance manufactures aftermarket automotive performance products. Specializing in LSx, LT, Hemi, and Coyote platforms, the company provides in-house cylinder head manufacturing, engine assembly, and camshaft grinding. Offerings include air induction, exhaust systems, valvetrain, cranks, rods, and complete engine builds.
Based in Jackson, MI, C. Thorrez Industries, Inc. specializes in precision machining for automotive components like transmissions, engines, and fluid power systems. IATF 16949 certified, they provide high-volume production for FCA, Ford, and General Motors, alongside Tier 1 suppliers. Capabilities include CNC turning, gear hobbing, and precision grinding.
Based in East Hanover, NJ, Weiss-Aug provides precision metal stamping, injection molding, and value-added assembly solutions. The company also offers tooling services, serving diverse industries with high-quality manufactured components. They deliver integrated solutions from design to final production.
Based in Wood Dale, IL, Wiegel serves OEM and tier automotive manufacturers with high-speed and heavy progressive die stamping services. The company specializes in manufacturing busbars, assemblies, and various metal components, also providing engineering, prototyping, and tooling support for complex production programs.
Based in Colmar, PA, Dorman Products, Inc. is an aftermarket supplier of automotive, heavy-duty, and commercial vehicle replacement parts. They specialize in the design, engineering, and distribution of a wide range of components, providing innovative solutions for auto repair professionals and vehicle owners to fix cars and trucks.
Based in Akron, OH, Engineering Group is an OEM auto parts manufacturer specializing in product development, mechanical engineering design, and rapid prototyping. The company is known for innovative tire technology, including airless and run-flat solutions, serving automotive, aerospace, defense, and marine sectors. They hold ISO 9001 certification.
JD Customs U.S.A. manufactures and supplies premium aftermarket automotive parts, specializing in custom modifications and exclusive components. The company produces titanium parts and carbon fiber upgrades, designed for performance enthusiasts seeking enhancements for various vehicle systems, including engine, drivetrain, exhaust, and suspension.
Based in Denver, CO, Precise Cast specializes in manufacturing automotive prototype car parts. They produce rapid aluminum prototypes, sand-cast cylinder heads, and sand-cast engine blocks. Their expertise includes complex casting for various automotive applications, serving the industry with specialized component fabrication.
Based in Costa Mesa, CA, Advanced Precision Machining Inc. is an AS9100 certified manufacturing organization. They offer precision CNC machining, milling, turning, fabrication, and prototyping services. Specializing in components for aerospace, military armored vehicles, and medical industries, they produce complex parts and assemblies for demanding industrial clients.
Based in El Monte, CA, All-New Stamping offers custom precision metal stamping and progressive die stamping services. Capabilities include laser cutting, sheet metal fabrication, and prototype stampings for various materials like steel, aluminum, and brass. They serve automotive, aerospace, electronics, medical, and defense industries.
Based in Watervliet, MI, Allstar Performance manufactures precision-engineered race car parts for competitive racing. They specialize in components for drag racing, road racing, circle track, sprint cars, off-road vehicles, tractor pulling, and hot rods, offering quality solutions for high-performance needs.
CARDONE Industries produces new and remanufactured vehicle replacement parts for the automotive aftermarket. Its extensive product portfolio includes brakes, drivetrain, electronics, engine components, fuel/air/exhaust systems, steering, and motors. The company specializes in providing comprehensive automotive solutions.
Based in Reedsville, PA, Extra Mile Brands engineers, manufactures, distributes, and sells high-quality automotive interiors, parts, and accessories. With nearly 50 years of experience, the company focuses on American-made vehicles, serving automotive enthusiasts.
IB-TECH manufactures high-quality automotive parts, specializing in seat adjusters for a variety of cars and trucks. The company supplies these components directly to auto manufacturers from its facilities in Bucyrus, Ohio, and Mt. Pleasant, Tennessee.
Based in Crystal Lake, IL, G&M Mfg. Corp. specializes in manufacturing precision metal stampings. They provide custom components for a wide range of industries, including the automotive, electronics, electrical, medical, industrial, and consumer markets, utilizing their own facilities and expertise.
Based in Anaheim, CA, Moseys Production Machinists provides 24/7 precision, production, Swiss, and CNC machining for parts 0.050″ to 24″. They offer end-to-end parts supply, including assembly and finishing, for diverse materials. Serving automotive, aerospace, and medical industries, the company holds ISO 9001 and AS 9100 certifications.
Based in Eaton, OH, Neaton Auto Products Manufacturing, Inc. is a Tier 1 automotive supplier. Specializing in plastics technology, the company produces steering wheels, airbag modules, and interior/exterior components. Capabilities include injection molding, blow molding, paint, weld, and assembly, providing IATF 16949 certified quality products for automakers.
Based in Valencia, CA, Pacific Metal Stampings manufactures custom component parts through precision metal stamping. They offer a range of capabilities including blanking, bending, coining, forming, and piercing. The company produces stamped metal parts from various base materials, serving industrial B2B customers requiring specialized manufacturing services.
Based in Jurupa Valley, CA, PAI Industries, Inc. manufactures and distributes quality service parts for the heavy-duty truck industry. Since 1973, they have utilized cutting-edge precision machinery and advanced robotics to produce engine, gearing, exhaust, and suspension components, supplying distributors worldwide.
Based in Holland, MI, Trans-Matic is a global metal stamping manufacturer specializing in complex, tightly toleranced component parts. They provide deep draw, transfer press, and progressive die stamping, along with product development, prototyping, and assembly services for various industries, including automotive.
Based in Long Beach, CA, DENSO Auto Parts is a prominent manufacturer of advanced automotive components. The company provides original equipment parts to top global automakers and offers a comprehensive range of quality aftermarket parts for various vehicle models, ensuring high performance and reliability.
Lear Corporation is a U.S.-based automotive supplier with over 100 years of heritage. The company directly manufactures and provides essential Seating and E-Systems for vehicles. It plays a significant role in shaping the future of mobility within the automotive industry through its own facilities and workforce.
Pacific Manufacturing Ohio Inc. is a U.S. subsidiary of Japan's Pacific Industrial Co., Ltd., specializing in the manufacture and sale of automotive components. The company produces valve-related products, wheel balance weights, tire pressure monitoring systems, and various pressing and plastic dies for the automotive industry.
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IATF 16949 is the global quality management standard specifically for the automotive industry. It builds upon ISO 9001 but adds stringent requirements focused on defect prevention, reduction of variation and waste, and continuous improvement throughout the supply chain. For most OEMs and Tier 1 suppliers, current IATF 16949 certification from an accredited body is a mandatory prerequisite for any production part manufacturer, reflecting the critical emphasis on product safety, reliability, and robust process controls.
PPAP is a standardized process that ensures a supplier can consistently produce parts meeting all customer engineering design record and specification requirements. It's required for all new parts, new or corrected parts from modified processes, or parts from new tooling/locations. A complete PPAP submission typically includes process flow diagrams, PFMEA, control plans, measurement system analysis (MSA) studies, initial process studies, and a Part Submission Warrant (PSW). It is the critical validation gate before mass production can begin, guaranteeing process capability and product conformity.
Tier 1 suppliers directly provide major assemblies or systems (e.g., complete dashboards, braking systems) to OEMs. Tier 2 suppliers provide components or sub-assemblies to Tier 1s (e.g., HVAC blowers, brake calipers). Tier 3 suppliers provide raw materials or basic parts to Tier 2s or 1s (e.g., specialized fasteners, specific alloy castings). Your choice depends on your position in the supply chain; OEMs typically work with Tier 1s, while startups or smaller firms might engage Tier 2 or 3 for individual components, potentially growing into a Tier 1 relationship.
Tooling ownership is a critical negotiation point in automotive. If you own the tooling, you gain flexibility to move production to another supplier if needed, but you become responsible for maintenance, repair, and potential end-of-life replacement costs. If the supplier owns the tooling (often amortized into the piece price), they are responsible for its upkeep and replacement, but you might be locked into that supplier or face significant fees to retrieve the tooling. For critical, high-volume, or proprietary parts, owning the tooling generally provides better long-term strategic control and supply chain flexibility.
Build-to-Print (BTP) sourcing means you provide complete design specifications, and the manufacturer builds the part exactly to your drawings. Black Box sourcing means you provide only functional requirements and performance specifications, and the supplier takes on the design responsibility, leveraging their proprietary knowledge and intellectual property to create the solution. Black Box is ideal when you need specialized design expertise or want to leverage a supplier's R&D capabilities, while Build-to-Print is best when you have a fully mature design and primarily need execution fidelity. 'Grey Box' is a common hybrid approach where the supplier contributes to design within your architectural framework.