Generation 1 (NASCAR)

{{Infobox racing car

| Image = NASCAR Hall of Fame (51417360812).jpg

| Caption = Hudson Hornet at the NASCAR Hall of Fame in Charlotte, North Carolina

| Constructor = {{flagicon|USA}} Hudson
{{flagicon|USA}} Chevrolet
{{flagicon|USA}} Ford
{{flagicon|USA}} Plymouth
{{flagicon|USA}} Oldsmobile
{{flagicon|USA}} Pontiac
{{flagicon|USA}} Studebaker

| Successor = Generation 2

| Wheelbase =

| Engine name = 90° pushrod V-8
Inline-six (Hudson Hornet only)

| Capacity = {{convert|303-440|cuin|L|1|lk=on|abbr=on}}

| Fuel =

| Tires =

| Debut = February 15, 1948
(Daytona Beach Road Course, Florida){{cite web | url=https://m.nascar.com/nascar-history | title=NASCAR History }}

| Last_event = October 30, 1966
(1966 American 500)

}}

The Generation 1 in NASCAR refers to the inaugural generation of post-war cars used between 1948 and 1966. The first generation of stock cars used a strictly-stock body and frame, the doors were strapped with the use of seat belts being required, and a heavy-duty rear axle was mandated to stop the cars from rolling over during a race.{{cite web | url=https://www.nascar.com/gallery/the-evolution-of-nascar-sprint-cup-cars/#photo-2 | title=The evolution of NASCAR Cup Series cars }} These cars were almost identical to their road-going counterparts, albeit with tuning and modifications to the car itself being prohibited. It was also notable for being the only generation of stock cars to use real doors.{{cite web | url=https://www.autoweek.com/racing/nascar/a36107106/nascar-generations/ | title=NASCAR's Wild Ride from Generation 1 Through 7 | date=6 May 2021 }} Examples include the Hudson Hornet, Oldsmobile Rocket 88, Ford Galaxie, Plymouth Belvedere, Pontiac Catalina, and the Chevrolet Impala.

They were eventually replaced by the Generation 2 cars in 1967.{{Cite web|url=https://www.espn.com/racing/nascar/cup/story/_/id/8848213/nascar-gen-6-cars-us-look-back-previous-cup-cars|title = Hinton: Generational shift|date = 16 January 2013}}{{Cite web|url=https://www.nascarhall.com/blog/nascar-cars-through-the-generations|title = NASCAR Cars Through the Generations | NASCAR Hall of Fame | Curators' Corner}}