International Hot Rod Association

The International Hot Rod Association (IHRA) is the second-largest drag racing sanctioning body in North America after the National Hot Rod Association (NHRA).

The IHRA was formed in November 1970 by businessman Larry Carrier. Throughout this period the organization was operated primarily in the south-eastern United States from its headquarters in Bristol, Tennessee. The IHRA initially followed the NHRA's professional class structure of Top Fuel, Funny Car and Pro Stock until the 1984 season when it decided to drop the premier Top Fuel category, an arrangement that only lasted three years before the class was reinstated for the 1987 season. Carrier is also credited with initiating drag racing's long-term sponsorship association with the R.J. Reynolds Tobacco Company's Winston brand, which has ended.

IHRA headquarters briefly moved to Waco, Texas in 1988 after it was purchased by Texan racer and track operator Billy Meyer who made many changes to the organization, some of which proved controversial amongst racers such as completely restructuring the sportsman classes overnight. Another radical change came as a result of Meyer's ownership of the Texas Motorplex, considered then to be the premier drag racing facility in the world. The Motorplex had previously been the NHRA's flagship track but for 1988 it hosted two IHRA national events and was the site of Top Fuel's first 4 second run by Eddie Hill. Other changes included the addition of a 'junior' Pro Stock class for small-block and V6 engines, named Factory Modified, which lasted until the end of the 1990 season. However, financial failure meant that Meyer's reign lasted just one year before the association was again sold on.

In 1988, the headquarters moved back to Bristol, Tennessee, under the ownership of Ted Jones and Jim Ruth.

In 1990, an all new class, Pro Modified, was introduced which has since become a feature at IHRA events and has become one of drag racing's most successful classes enjoying popularity in both North America and Europe. During this period Pro Modified became the IHRA's main asset in its recovery from the 1988 season that had nearly destroyed it.

However, the nitromethane powered Funny Car class was dropped for the 1991 season only to be reinstated for 1992 before being dropped again, not to return until 2006. In 2009 IHRA dropped the funny car class again due to sponsor problems caused by a deep recession in the American economy.

In 1998, the organization was purchased by Bill Bader who significantly expanded the promotion in the Great Lakes from his headquarters in Norwalk, Ohio. He sold the IHRA to Clear Channel Communications, but remained as president until his retirement in October 2004. The headquarters remain in Norwalk, which was once the site of the IHRA's flagship World Nationals event.

In 2005, Clear Channel was split into Clear Channel Radio and Live Nation, with IHRA becoming part of the latter. Feld Entertainment bought Live Nation's motorsports division in 2008, and operated the IHRA for four years.