???

I always thought the SVT 2003 Cobra used an Eaton M112 unit... a roots-type blower. Those are the ones that give more of a whine from the factory. Same as on the Lightning. Some of the 80's-90's Thunderbirds used the M90... Ford has always been fond of the Roots blowers because of the cheap manufacturing costs. Efficiency is low with those types though, as they generate tons of heat. Ever see Lightings run several 1/4 mile runs in a row? There's almost always going to be a bag or two of ice laying around, to lay on top of and chill the blower in between runs.

Kenne Bell offers the blowzilla supercharger (twin-screw) for the '03 Cobra and that thing absolutely screams... whine is an understatement.