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For competition, race customers had a range of options available to them including the N03 36-Gallon Fuel Tank, closer rear axle ratios and the C48 Heater/Defroster Delete (-100). Most cars equipped like this came with either L78 or the L84 with Ram-Jet Fuel Injection.
NEXTEL Cup drivers Tony Raines and Jeff Green, along with hundreds of fans in Daytona Intemational Speedway's acclaimed NEXTEL FANZONE, got the first look at the 2007 Daytona 500 pace car with a special unveiling during the NASCAR Jackson Hewitt Preseason ‘Thunder Fan Fest. Corvettes were also used as Track cars and other support vehicles during the event activities at that years Daytona Speed Weeks. Corvettes were also used as Track cars and other support vehicles.
1993 ZR-1 COrvette
The C4 ZR-1 Corvette, even some 30 years after its initial year of production, carries indisputable performance merit, the likes of which few can deny. In fact, the ZR-1 is often cited as the car which helped fend off threats, both foreign and domestic in origin, to the Corvette's elite performance car status. However, after only 6,939 ZR-1 Corvettes were built, and 6 years of production had passed, the program was terminated, falling victim to decisions regarding pricing.
The first Z06 was actually an option package first offered with the 1963 Corvette. The package was developed by Corvette's legendary lead engineer and racing advocate Z0ra Arkus-Duntov.  The Z06 option was designed to allow consumers to bolster the 1963 "Split-Window" Corvettes performance and handling capabilities for use on the race track. Selecting regular production option (RPO) Z06 when ordering a Corvette resulted in a car equipped with some tasty options.
A successor to the ZR-1 made its debut in 2001 as the Z06, giving a nod to the high-performance Z06 version of the C2 Corvette of the 1960s. The Z06 uses a tuned version of the standard LS1 engine (designated the LS6), with a higher power output of 385 hp (390 PS; 287 kW), later bumped to 405 hp (411 PS; 302 kW) starting in 2002.