NASCAR Whelen Modified Tour

The NASCAR Whelen Modified Tour (NWMT) (previously the NASCAR Winston Modified Tour and NASCAR Featherlite Modified Series from 1985 until 2005) is a modified stock car racing series owned and operated by NASCAR in the Modified Division. The Modified Division is NASCAR's oldest division, and is the only open-wheeled division that NASCAR sanctions. NASCAR Whelen Modified Tour events are mainly held in the northeastern United States, but the 2007 and 2008 tours expanded to the Midwest with the addition of a race in Mansfield, Ohio. The tour races primarily on short oval paved tracks, but the NWMT also has made appearances at larger ovals and road courses.

The NASCAR Modified Division was formed as part of NASCAR's creation in December 1947. NASCAR held a modified race as its first sanctioned event, on February 15, 1948, on the beach course at Daytona Beach, Florida. Red Byron won the event and 11 more races that year, and won the first NASCAR Modified Championship. (The Strictly Stock Division, which evolved into today's premier Cup Series, did not race until 1949.) Post-World War II modifieds were a form of "stock car" (contrasted against purpose-built AAA championship cars, sprints, and midgets) which allowed some modification, typically substitution of stronger truck parts. Most cars were pre-WWII coupes and coaches. This pattern continued through the 1960s, with aftermarket performance parts and later-model chassis (such as the 1955–57 Chevrolet's frame) becoming more common. Modifieds became known for technical innovation, both in homebuilt parts and in adapting components from other types of vehicles. By 1970, many modifieds featured big-block engines, fuel injection, eighteen-inch-wide rear tires, radically offset engine locations, and other technologies that made them faster on short tracks than any full-bodied race cars including Grand National cars.

The predecessor to the NASCAR Whelen Modified Tour was NASCAR's National Modified Championship, which was determined by total points from weekly NASCAR-sanctioned races as well as a schedule of national championship races. Parts of the northeastern and southeastern US were hotbeds of modified racing in the 1950s and 1960s; some racers competed five nights per week or more. Often the same car was raced on both dirt and paved tracks, changing only tires and perhaps springs and shock absorbers. In the late 1960s and early 1970s, the technology of dirt and pavement modifieds diverged to make them separate types of race car. NASCAR was no longer sanctioning dirt tracks which held modified races, so the NASCAR modified rules became the standard for asphalt Modifieds. (Starting in the early 1970s, northeastern US dirt modified racetracks began to join the DIRT organization founded by Glenn Donnelly.) Most unsanctioned tracks used similar modified rules to NASCAR's, or specified the same cars with cost-limiting rules such as smaller engines or narrow tires.

In the 1980s, it became prohibitively expensive for modified teams to tow long distances to sixty or more races per year, including Watkins Glen International and Daytona International Speedway, Bowman Gray Stadium in Winston-Salem, North Carolina, North Wilkesboro Speedway, and Martinsville Speedway, with the North Wilkesboro races part of the Cup weekend. To enable more than a few teams to contend seriously for the championship, it was decided to reformat the Modified Division's championship to a limited schedule of races not conflicting with one another. This change mirrored similar format changes to the Grand National Division starting in 1972 and the Late Model Sportsman Division (now Xfinity Series) starting in 1982. Richie Evans ran 66 NASCAR modified features (and several unsanctioned events such as the Race of Champions) in 1984, the final year of the old system.

The modern-day NASCAR Whelen Modified Tour was first held in 1985 with 29 races, named the "NASCAR Winston Modified Tour". It switched sponsorship to the Featherlite Trailers brand in 1994, and was renamed the "NASCAR Featherlite Modified Series".

Two major changes to the NASCAR Whelen Modified Tour came in 2005.

In 2005, Whelen Engineering took over sponsorship of the series, which was renamed the "NASCAR Whelen Modified Tour".

Beginning in 2005 NASCAR sanctioned a new modified division in the southeastern United States known as the Whelen Southern Modified Tour. The two tours agreed to run a combined race at Martinsville Speedway.