Roush Performance has been a huge contender in the American automotive marketplace, and with the 2016 Roush Stage 3 Mustang consumers have been graced with the most powerful production Mustang, ever. This glorious 50-state emissions legal Mustang is pumping out an astonishing 670 horsepower through its factory 5.0-liter Coyote powerplant. With the help of a new 2.3-liter TVS Roushcharger supercharger, pricing for the RS3 starts at $22,590 above a base model GT.

With aftermarket parts it’s nearly impossible to know the emissions outcomes. Customizing your street-driven Mustang can be rewarding and time-consuming. Sadly, it can also turn into a headache very quickly when it comes to local emission laws.

On the flip side, Roush has put countless hours of research, development, and testing to make sure owners of Roush Performance vehicles don’t have to worry when the time comes to pass the dreaded smog check.

The ’16 RS3 has earned 50-state vehicle emissions certification, as well as ongoing emissions diagnostics certifications. This ensures that both the emissions compliance and the fault detection systems of the vehicle’s emissions system will function for the full useful life of 120,000 miles 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 Gary Jurick, president of Roush Performance.

This certification makes the ’16 RS3 a viable option for any and all car enthusiasts craving a well-rounded Mustang, that will, at a push of the go-fast pedal, fry a set of tires and put a grin on any driver’s face. Even if the 670 hp RS3 isn’t the direction you’re looking to head, Roush has a complete lineup of awesome emission-friendly RS vehicles, including the 300 hp V6 RS model, 310 hp 4-cylinder EcoBoost-powered Roush Stage 1, and the more impressive 435 hp 5.0-liter Coyote Roush Stage 2.

Roush Performance has once again developed killer automotive products to compete with the rest of the evolving musclecar world, with the entire line-up emissions-certified in all 50 United States, and backed with a three-year/36,000-mile limited warranty.