The Indiana State Police's newest patrol cars -- unmarked 2008 Mustang GTs -- have revved up big numbers since they hit the highways in late May.

The officers of the 18-car Mustang Unit wrote more than 4,600 speeding citations in June. That averages to about seven tickets per day, per car.

That shows they're doing exceeding well," said State Police Sgt. Richard W. Myers, a spokesman for the Putnamville district. "They don't (respond to) crashes or make emergency runs. . . . They simply focus on speeders."

Statewide speeding citation figures for May were not immediately available.

Among those recently pinched by the State Police unit: a 60-year-old Indianapolis man who was cited Thursday for driving his 1989 Corvette 127 mph on Ind. 37 near Waverly, Myers said -- more than twice the 60 mph speed limit.

"It's kind of what the whole (unit) was started for: for extreme speeders, the ones who are looking for our marked cars and think they can outrun us," he said.

The driver also faces a charge of operating on a suspended driver's license and fines of as much as $500 for each of the infractions.

"Before I could get a radar clock on the vehicle, I knew it was going to be extremely fast," Trooper Dustin Starnes, an eight-year State Police veteran who caught up to the driver, said in a release. "That is the fastest speed I have stopped in the Mustang."

One Mustang is assigned to each of the state's 18 State Police posts, Myers said, but sometimes the unit works as a "wolf pack" to saturate high-traffic areas or patrol large events.

Mustangs aren't new to Hoosier highways. Troopers used them in the late 1980s. Other models have been used for patrols, too, such as Chevy Camaros and even a modified Indiana Department of Transportation truck, Myers said.