One supercharger manufacturer looking to make a big impact in the Mustang market is Magnuson Products [(805) 642-8833; www.magnusonproducts.com]. This new 3.1-liter TVS supercharger should could put Magnuson in the mix with the giant twin-screw offerings, but as of yet, it's not available. Magnuson hasn't decided whether to release the 3.1, which would be aimed the Shelby GT500 market as a supercharger upgrade for the factory Eaton. In the meantime, Magnuson does have kits available for '05-up Three-Valves. The company also had an Eaton TVS blower for 351 Windsor applications at PRI. Could you imagine a TVS on a Windsor? That would be ridiculous.