K Kevin M Jun 30, 2004 #2 Muscle Mustangs tested both heads on the same motor about 6 months ago. The Roush heads were down a good 40 HP and it was a fairly mild motor. Roush has a name from their racing, but a lot of their street stuff is pretty poor. Kevin
Muscle Mustangs tested both heads on the same motor about 6 months ago. The Roush heads were down a good 40 HP and it was a fairly mild motor. Roush has a name from their racing, but a lot of their street stuff is pretty poor. Kevin
