Manufacturers and Tuners: What is the Difference, and Why Does It Matter?

In the past year, we’re turned out some powerful vehicles here at ROUSH Performance: our 670-horsepower Stage 3 Mustang, 600-horsepower Nitemare, and 727-horsepower P-51 Mustang are three of the most powerful production vehicles on the market right now. With such high-horsepower applications, our vehicles have earned impressive titles. The Nitemare is currently the “World’s Fastest Production Truck”, while our limited-edition P-51 is “America’s Most Powerful Production Car”. Due to confusion surrounding the differences between manufacturers (like ROUSH) and tuners, comparisons have been made to vehicles built by tuners that may be advertised to produce more horsepower. While there is always someone who will build “faster, more powerful” vehicles than the next company, let us explain how our vehicles have earned their respective titles.

As a Manufacturer of Record, ROUSH earns 50-state vehicle emissions and ongoing emissions diagnostics certifications to ensure emissions compliance and fault detection for the full useful life (120,000 miles) of the vehicle emissions system, as defined by the Environmental Protection Agency (EPA).

“Emissions certification as an MOR, or Manufacturer of Record, requires us to meet the same standards as Original Equipment Manufacturers like Ford Motor Company. Having this certification is important, as it allows us to build ROUSH Mustangs as pre-titled vehicles,” explains President of ROUSH Performance, Gary Jurick. “The level of engineering, durability and compliance testing necessary to meet strict 50-state emissions certifications from CARB and the EPA, is a prerequisite for enabling our dealers to sell a ROUSH Mustang as a new vehicle.”

The entire 2017 ROUSH Stage 3 Mustang and each of our F-150s and Nitemares are built to ROUSH’s exacting standards right here at Building 79 - the manufacturing facility just west of Detroit, Michigan. Well-trained professionals build each ROUSH vehicle with a high degree of repeatability, reproducibility, and traceability. Once built, each vehicle must then pass through an extensive end-of-line review and inspection process before being shipped to the customer. In addition, our finished vehicles retain their factory warranties.

“We test everything to a vehicle manufacturer’s standard,” says ROUSH Performance VP of Marketing, Nic Shafer. ”Superchargers, exhaust systems, suspension, wheels, even the decals, are tested to guarantee quality. Emissions, however, is a critical piece that’s a core component to our manufacturing. You can’t skip that step because ROUSH is a performance vehicle manufacturer, NOT a tuner.”

About the author

ROUSH Performance
ROUSH Performance
ROUSH Performance, a division of Roush Enterprises, designs, engineers and manufactures completely assembled pre-titled vehicles, aftermarket performance parts, and superchargers for the global performance enthusiast market. Based in Plymouth Township, Michigan, ROUSH Performance was founded in 1995 by motorsports legend Jack Roush.
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