As most of you probably know - we installed a pair of Flowmaster Series 50 Delta Flow mufflers on a 1967 Mustang hardtop using a complete exhaust system from Virginia Classic Mustang, including 289 High Performance exhaust manifolds. At last, Flowmaster has designed cabin resonance out of its throaty mufflers. Out back is a soft, throaty bark. Inside - a soft drone that's not hard on your hearing. Perfection achieved. Virginia Classic Mustang is also a Flowmaster dealer - proof all roads lead to Broadway, Virginia.