BBK Performance Power-Plus Series Underdrive Pulley System Features: CNC Machined Billet Aluminum Bolt-On 10-15 Horsepower In Under 30 Minutes Retains Full Cooling And Charging Uses Existing Factory Serpentine Belt 3 Pc Kit Non SFI Height: 7.00 Width: 7.00 Length: 5.00 Weight: 4.00 lbs Fitment: 2004/Ford/Mustang/SVT Cobra Coupe 2-Door/4.6L 281Cu. In. V8 GAS DOHC Supercharged^^2004/Ford/Mustang/SVT Cobra Convertible 2-Door/4.6L 281Cu. In. V8 GAS DOHC Supercharged^^2004/Ford/Mustang/Mach I Coupe 2-Door/4.6L 281Cu. In. V8 GAS DOHC Naturally Aspirated^^2004/Ford/Mustang/GT Equipado Coupe 2-Door/4.6L 281Cu. In. V8 GAS SOHC Naturally Aspirated^^2004/Ford/Mustang/GT Equipado Convertible 2-Door/4.6L 281Cu. In. V8 GAS SOHC Naturally Aspirated^^2004/Ford/Mustang/GT Coupe 2-Door/4.6L 281Cu. In. V8 GAS SOHC Naturally Aspirated^^2004/Ford/Mustang/GT Convertible 2-Door/4.6L 2...