In 2004, Roush released a limited edition mustang known as the 440A. This was a Stage 3 Roush with the addition of a custom 440A interior, Roush braking system, and a rear exhaust system instead of the side-mounted exhaust system. The 440A model was released in 2004 to commemorate the 40 years of Ford Mustang production. Only 40 Roush 440A Mustangs were produced and all were sold at Brandon Ford dealership in Tampa Florida. Roush also claimed that this model produced , a claim that has been argued by some who claim that the engine was dyno tested at .