August 25, 2011 This years Woodward Dream Cruise has been chock full of surprises from Ford. First it was showing off the new 2011 Boss 302 Mustang. Then a strong showing by the new Fiesta. And yesterday Ford and Ford Racing announced a Roush/Whipple developed twin-screw supercharger kit for the 2011 Mustang 5.0L.

For $7000 or so you get the 2.3L twin-screw supercharger, a specially designed intake manifold, an air-to-liquid intercooler system, 47 lb/hr fuel injectors, and a new tune via the Ford Racing ProCal tool. This setup produces 7 pounds of boost and yields 525 horsepower and 470 lb-ft of torque – oh, 50 state smog legal too. That is a gain of 113 hp and 80 pound-feet over the factory normally-aspirated rating of 412 hp at 6,500 rpm and 390 lb-ft of torque at 4,250.

An optional 9 psi pulley is available if you should desire 624 horsepower and 536lb-ft of torque. However, the 9 psi kit was apparently just a bit much for state bureaucrats, and is not smog legal in all states.

Perhaps the most compelling news is that Ford is offering a 12-mo/12,000 warranty on the 525 horsepower supercharger kit IF you have it installed at a Ford dealership. Yes you will pay an arm and a leg for installation, but maybe the peace of mind is worth it. The warranty is not offered in any form on the 9 psi kit. Installation of either kit, however, does not void the factory warranties.