Founded in Oakland in 1950, A-1 Spring Service repairs and installs suspension systems and vehicle front-end components for cars, trucks, trailers, and other vehicles. This family-owned business has served the Bay Area for more than seven decades, passing its spring and suspension know-how from one generation to the next. Today, owners Ruben, Tency, and Joel continue the shop’s hands-on Oakland tradition.
Progressive AutomotiveProgressive Automotive has been shaping the hot-rod suspension market since 1976, when it introduced its Mustang II independent front-suspension kits. From its Baltimore, Ohio shop, the company builds custom frames and rolling chassis for owners restoring classic vehicles, with a focus on preserving original contours while adding modern performance. Its early adoption of Corvette suspension technology earned an NSRA Industry Appreciation Award in 1984.BALTIMORE, OH
Martz ChassisSince 1970, family-owned Martz Chassis has built custom performance suspension systems and chassis for street rods, muscle cars and other enthusiast vehicles in Bedford, Pennsylvania. Founded by racing mechanic and engineer Gary Martz, the company remains under the leadership of his son Andy, carrying a generation of racing-derived chassis knowledge into custom fabrication and installation work.BEDFORD, PA
Gorman EnterprisesFamily-owned and operated since 1981, Gorman Enterprises grew from founder Bill Gorman’s hands-on experience as a mechanic and collision technician. The Elma company is known for taking on unusual specialty-vehicle projects, backed by a 46,000-square-foot facility and mobile service teams that support customers across New York.ELMA, NY
Triangle Suspension Systems, IncTriangle Suspension Systems, Inc. makes undercarriage products for heavy-, medium- and light-duty trucks and trailers, including steel leaf springs manufactured in the United States. Founded in 1919, the company traces its roots to Pittsburgh’s Golden Triangle and moved its operations to DuBois, Pennsylvania, in 1927; it reports that its products are backed by ISO-registered facilities and distributed through a nationwide network.DU BOIS, PA