Tap and die sets include a gauge that calculates threads per inch. Select the corresponding die that matches with the reading on the thread per inch gauge, and set the die in the handle that comes with the set.
The IROC-Z model of the Chevrolet Camaro first made its public appearance in 1985 as an add on option to the 1985 Camaro Z28 model. But its origin began long before that. IROC stands for International Race of Champions which is an automobile racing series similar to what NASCAR is.
The Chevrolet Camaro is one of the pony cars built in response to the overwhelming success of Ford's Mustang in the late 1960s. Once built, the Camaro's mechanicals and interior helped spawn other Chevy's like the Corvair and the Chevy II. The Chevy II was later known as the Chevy Nova. Although it was never one of General Motors marquee brands, the Camaro has still proven to be a popular sports car option.