OE-quality products, speed to market, and a customer-centric focus—these are the hallmarks of the Associated Parts Group. With one unified mission and purpose, we collectively strive to set the standard in quality, innovation, and service for the Automotive Aftermarket.
Associated Parts
SINCE 1927
A Marmon | Berskhire Hathaway Company
SKUs Covering
Wide Applications
New Products
Introduced Every Year
Hours of Annual
Engineering Validation
When professional installers demand OE-quality straight out of the box, we deliver. Validated to the highest specifications, built on OE-approved lines, and 100% tested and inspected before shipping. No shortcuts.
Our Brands
AP Emissions Technologies
AP Emissions Technologies is a leading manufacturer of aftermarket emissions and exhaust solutions for automotive, light-duty, medium-duty, and heavy-duty vehicles. Backed by nearly 100 years of innovation and vertically integrated manufacturing capabilities, AP delivers OEM-quality performance, ensures regulatory compliance, and offers extensive product coverage to customers worldwide.
Aristo
Aristo is a leading supplier of advanced catalytic converters and emissions control technologies, specializing in cost-effective catalyst solutions for gasoline and diesel applications. With proprietary coating and formulation processes, Aristo delivers high-performance systems that optimize precious metal usage while meeting stringent environmental standards worldwide.
Fanmar
Perfection HyTest
Marmon Ride Control
Marmon Ride Control delivers premium engine and transmission mounts, steering, and chassis components for the automotive aftermarket. Built to exceed OE standards, its precision-engineered products ensure lasting performance, reliability, and fit. Backed by rigorous validation and engineering excellence, Marmon Ride Control provides exceptional quality and broad coverage for professional installers.
Rostra
For over 30 years, Rostra Powertrain Controls has set the standard in transmission electronics. Backed by ISO-9001:2015 and IATF-16949:2016 certifications, our products—whether manufactured at our North Carolina facility or sourced from our trusted global supplier network—are recognized globally for unmatched quality and customer service.
Trensor
Marmon Holdings, Inc., a Berkshire Hathaway company, comprises 10 groups and more than 120 autonomous businesses with total annual revenue of $12 billion. Marmon’s 30,000-plus team members serve diverse industries and markets worldwide.
Each member business operates under its own management within a sector structure that provides access to the experience and expertise of other members in related businesses and markets.
