Stock car races in the NASCAR Cup Series have been held at North Wilkesboro Speedway in North Wilkesboro, North Carolina since 1949.

Spring race

The First Union 400 was a NASCAR Winston Cup Series stock car race held annually from 1951 to 1996 at the North Wilkesboro Speedway in Wilkes County, North Carolina. It was the first of two Winston Cup Series races held annually (with the autumn's Tyson Holly Farms 400) at North Wilkesboro Speedway before the track was abandoned in 1996. The race was normally held in late March or early April.

Past winners YearDateDriverTeamManufacturerRace distanceRace timeAverage speed(mph)ReportRef Laps Miles (km) 1951 April 2914 Fonty Flock Frank Christian Oldsmobile15093.75 (150.876) Report 1952 March 3092 Herb Thomas Herb Thomas Hudson200125 (201.168)2:08:0058.597 Report 1953 March 2992 Herb Thomas Herb Thomas Hudson200125 (201.168)1:44:18 71.907 Report 1954 April 43 Dick Rathmann John Ditz Hudson160100 (160.934)1:27:3268.545 Report 1955 April 387 Buck Baker Bob Griffin Oldsmobile160100 (160.934)1:22:0373.126 Report 1956 April 8300A Tim Flock Carl Kiekhaefer Chrysler160100 (160.934)1:24:2871.034 Report 1957 April 722 Fireball Roberts Pete DePaolo Ford160100 (160.934)1:19:5975.015 Report 1958 May 1811 Junior Johnson Paul Spaulding Ford160100 (160.934)1:16:1878.636 Report 1959 April 543 Lee Petty Petty Enterprises Oldsmobile160100 (160.934)1:23:2171.985 Report 1960 March 2742 Lee Petty Petty Enterprises Plymouth160100 (160.934)1:30:2666.347 Report 1961 April 164 Rex White Rex White Chevrolet400250 (402.336) 3:00:1183.248 Report 1962 April 1543 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:57:0184.737 Report 1963 April 2843 Richard Petty Petty Enterprises Plymouth257*160.625 (258.5)1:57:0683.301 Report 1964 April 1928 Fred Lorenzen Holman-Moody Ford400250 (402.336)3:03:0581.93 Report 1965 April 1826 Junior Johnson Junior Johnson & Associates Ford400250 (402.336)2:37:49 95.047 Report 1966 April 1714 Jim Paschal Frieden Enterprises Plymouth400250 (402.336)2:50:2289.045 Report 1967 April 1626 Darel Dieringer Junior Johnson & Associates Ford400270 (434.522)2:40:1693.594 Report 1968 April 2117 David Pearson Holman-Moody Ford400250 (402.336)2:45:3390.425 Report 1969 April 2022 Bobby Allison Mario Rossi Dodge400250 (402.336)2:37:2795.268 Report 1970 April 1843 Richard Petty Petty Enterprises Plymouth400250 (402.336) 2:38:4194.246 Report 1971 April 1843 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:32:1998.479 Report 1972 April 2343 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:53:1986.381 Report 1973 April 843 Richard Petty Petty Enterprises Dodge400250 (402.336)2:34:1797.224 Report 1974 April 2143 Richard Petty Petty Enterprises Dodge360*225 (362.102)2:20:2096.2 Report 1975 April 643 Richard Petty Petty Enterprises Dodge400250 (402.336)2:46:3990.009 Report 1976 April 411 Cale Yarborough Junior Johnson & Associates Chevrolet400250 (402.336)2:34:52 96.858 Report 1977 March 2711 Cale Yarborough Junior Johnson & Associates Chevrolet400250 (402.336) 2:48:3888.95 Report 1978 April 1688 Darrell Waltrip DiGard Motorsports Chevrolet400250 (402.336)2:42:2692.345 Report 1979 March 2515 Bobby Allison Bud Moore Engineering Ford400250 (402.336)2:49:41 88.4 Report 1980 April 2043 Richard Petty Petty Enterprises Chevrolet400250 (402.336)2:37:0495.501 Report 1981 April 543 Richard Petty Petty Enterprises Buick400250 (402.336) 2:55:4185.381 Report 1982 April 1811 Darrell Waltrip Junior Johnson & Associates Buick400250 (402.336)2:33:3797.646 Report 1983 April 1711 Darrell Waltrip Junior Johnson & Associates Chevrolet400250 (402.336)2:44:03 91.436 Report 1984 April 827 Tim Richmond Blue Max Racing Pontiac400250 (402.336)2:33:1997.83 Report 1985 April 2112 Neil Bonnett Junior Johnson & Associates Chevrolet400250 (402.336)2:39:53 93.818 Report 1986 April 203 Dale Earnhardt Richard Childress Racing Chevrolet400250 (402.336)2:49:40 88.408 Report 1987 April 53 Dale Earnhardt Richard Childress Racing Chevrolet400250 (402.336)2:39:2494.103 Report 1988 April 1711 Terry Labonte Junior Johnson & Associates Chevrolet400250 (402.336)2:31:2499.075 Report 1989 April 163 Dale Earnhardt Richard Childress Racing Chevrolet400250 (402.336)2:46:4789.937 Report 1990 April 2226 Brett Bodine King Racing Buick400250 (402.336)2:58:4683.908 Report 1991 April 2117 Darrell Waltrip DarWal, Inc. Chevrolet400250 (402.336)3:08:2679.604 Report 1992 April 1228 Davey Allison Robert Yates Racing Ford400250 (402.336)2:45:2890.653 Report 1993 April 182 Rusty Wallace Penske Racing Pontiac400250 (402.336)2:41:5992.602 Report 1994 April 175 Terry Labonte Hendrick Motorsports Chevrolet400250 (402.336)2:36:3395.816 Report 1995 April 93 Dale Earnhardt Richard Childress Racing Chevrolet400250 (402.336)2:26:27102.424 Report 1996 April 145 Terry Labonte Hendrick Motorsports Chevrolet400250 (402.336)2:35:3996.37 Report

1963: Race shortened due to rain. 1974: Race shortened due to energy crisis. 1977: Yarborough won on his birthday, the first driver to do so. 1990: Bodine's lone Winston Cup victory and last win for Buick; finish disputed due to a scoring error.

Multiple winners (drivers) # Wins Driver Years won 10 Richard Petty 1962, 1963, 1970, 1971, 1972, 1973, 1974, 1975, 1980, 1981 4 Darrell Waltrip 1978, 1982, 1983, 1991 Dale Earnhardt 1986, 1987, 1989, 1995 3 Terry Labonte 1988, 1994, 1996 2 Herb Thomas 1952, 1953 Lee Petty 1959, 1960 Junior Johnson 1958, 1965 Cale Yarborough 1976, 1977 Bobby Allison 1969, 1979

Manufacturer wins # Wins Manufacturer Years won 15 Chevrolet 1961, 1976, 1977, 1978, 1980, 1983, 1985, 1986, 1987, 1988, 1989, 1991, 1994, 1995, 1996 8 Ford 1957, 1958, 1964, 1965, 1967, 1968, 1979, 1992 7 Plymouth 1960, 1962, 1963, 1966, 1970, 1971, 1972 4 Dodge 1969, 1973, 1974, 1975 3 Hudson 1952, 1953, 1954 Oldsmobile 1951, 1955, 1959 Buick 1981, 1982, 1990 2 Pontiac 1984, 1993

Fall race

The Window World 450 was the second of two Winston Cup Series races held annually at North Wilkesboro Speedway before the track was abandoned in 1996.

In 2023, during NASCAR's 75th anniversary season, the NASCAR All-Star Race moved to North Wilkesboro Speedway. In 2026, the All-Star Race was moved to Dover Motor Speedway, giving North Wilkesboro a points-paying race. In 2027, the NASCAR All-Star Race moved back to North Wilkesboro Speedway.

When the race returned to the schedule, it was originally scheduled as a 400 lap event, being dubbed the "Window World 400". However, on December 4, 2025, North Wilkesboro track officials announced the race would be extended by 50 laps, being dubbed the "Window World 450".

Past winners YearDateDriverTeamManufacturerRace distanceRace timeAverage speed(mph)ReportRef Laps Miles (km) 1949 Oct 167 Bob Flock Frank Christian Oldsmobile200100 (160.934)1:52:2653.364 Report 1950 Sept 2498 Leon Sales Hubert Westmoreland Plymouth200125 (201.168) Report 1951 Oct 217 Fonty Flock Ted Chester Oldsmobile200125 (201.168)1:50:3867.791 Report 1952 Oct 269 Herb Thomas Herb Thomas Hudson200125 (201.168)1:51:5267.044 Report 1953 Oct 1146 Speedy Thompson Buckshot Morris Oldsmobile160100 (160.934)1:24:1671.202 Report 1954 Oct 2414 Hershel McGriff Frank Christian Oldsmobile157*98.125 (157.916)1:30:2065.175 Report 1955 Oct 2387 Buck Baker Pete DePaolo Ford160100 (160.934)1:21:1672.347 Report 1956 Not held 1957 Oct 2047 Jack Smith Jack Smith Chevrolet160100 (160.934)1:29:1069.902 Report 1958 Oct 1911 Junior Johnson Paul Spaulding Ford160100 (160.934)1:10:4084.906 Report 1959 Oct 1842 Lee Petty Petty Enterprises Oldsmobile160100 (160.934)1:20:1174.829 Report 1960 Oct 24 Rex White Rex White Chevrolet320200 (321.868)2:34:5777.444 Report 1961 Oct 14 Rex White Rex White Chevrolet320200 (321.868)2:21:4384.675 Report 1962 Sept 3043 Richard Petty Petty Enterprises Plymouth320200 (321.868)2:19:1486.186 Report 1963 Sept 2921 Marvin Panch Wood Brothers Racing Ford400250 (402.336)2:47:4489.428 Report 1964 Oct 1121 Marvin Panch Wood Brothers Racing Ford400250 (402.336)2:44:0791.398 Report 1965 Oct 326 Junior Johnson Junior Johnson & Associates Ford400250 (402.336)2:48:5588.801 Report 1966 Oct 229 Dick Hutcherson Holman-Moody Ford400250 (402.336)2:48:3189.012 Report 1967 Oct 143 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:38:1094.837 Report 1968 Sept 2943 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:39:2494.103 Report 1969 Oct 517 David Pearson Holman-Moody Ford400250 (402.336)2:40:3293.429 Report 1970 Oct 471 Bobby Isaac Nord Krauskopf Dodge400250 (402.336)2:46:2090.162 Report 1971 Nov 2155 Tiny Lund Ronnie Hopkins Camaro400250 (402.336)2:35:5896.174 Report 1972 Oct 143 Richard Petty Petty Enterprises Plymouth400250 (402.336)2:36:3395.816 Report 1973 Sept 2312 Bobby Allison Bobby Allison Chevrolet400250 (402.336)2:37:3495.198 Report 1974 Sept 2211 Cale Yarborough Junior Johnson & Associates Chevrolet400250 (402.336)3:05:4180.782 Report 1975 Sept 2143 Richard Petty Petty Enterprises Dodge400250 (402.336)2:48:3488.986 Report 1976 Oct 311 Cale Yarborough Junior Johnson & Associates Chevrolet400250 (402.336)2:35:38 96.38 Report 1977 Oct 288 Darrell Waltrip DiGard Motorsports Chevrolet400250 (402.336)2:52:5986.713 Report 1978 Oct 111 Cale Yarborough Junior Johnson & Associates Oldsmobile400250 (402.336)2:43:1897.847 Report 1979 Oct 1427 Benny Parsons M.C. Anderson Racing Chevrolet400250 (402.336)2:44:0191.454 Report 1980 Sept 2115 Bobby Allison Bud Moore Engineering Ford400250 (402.336)3:18:3975.51 Report 1981 Oct 411 Darrell Waltrip Junior Johnson & Associates Buick400250 (402.336)2:41:0893.091 Report 1982 Oct 311 Darrell Waltrip Junior Johnson & Associates Buick400250 (402.336)2:32:5798.071 Report 1983 Oct 211 Darrell Waltrip Junior Johnson & Associates Chevrolet400250 (402.336)2:28:56100.716 Report 1984 Oct 1411 Darrell Waltrip Junior Johnson & Associates Chevrolet400250 (402.336)2:45:4290.525 Report 1985 Sept 2933 Harry Gant Mach 1 Racing Chevrolet400250 (402.336)2:37:4495.077 Report 1986 Sept 2811 Darrell Waltrip Junior Johnson & Associates Chevrolet400250 (402.336)2:36:5395.612 Report 1987 Oct 411 Terry Labonte Junior Johnson & Associates Chevrolet400250 (402.336)2:36:0996.051 Report 1988 Oct 16*27 Rusty Wallace Blue Max Racing Pontiac400250 (402.336)2:39:1594.192 Report 1989 Oct 15*5 Geoff Bodine Hendrick Motorsports Chevrolet400250 (402.336)2:46:0890.269 Report 1990 Sept 306 Mark Martin Roush Racing Ford400250 (402.336)2:39:5393.818 Report 1991 Sept 293 Dale Earnhardt Richard Childress Racing Chevrolet400250 (402.336)2:39:2394.113 Report 1992 Oct 515 Geoff Bodine Bud Moore Engineering Ford400250 (402.336)2:19:43107.36 Report 1993 Oct 32 Rusty Wallace Penske Racing Pontiac400250 (402.336)2:34:4696.92 Report 1994 Oct 27 Geoff Bodine Geoff Bodine Racing Ford400250 (402.336)2:32:1598.522 Report 1995 Oct 16 Mark Martin Roush Racing Ford400250 (402.336)2:25:38102.998 Report 1996 Sept 2924 Jeff Gordon Hendrick Motorsports Chevrolet400250 (402.336)2:34:5496.837 Report1997–2025 Not held 2026 July 1922 Joey Logano Team Penske Ford450281.25 (452.63)2:50:5788.397 Report

1954: Race shortened due to crash. 1988: The race was originally scheduled for October 2, but two consecutive days of rain caused it to be rescheduled for October 16. 1989: The race was originally scheduled for October 1, but persistent rain caused it to be rescheduled for October 15.

Multiple winners (drivers) # Wins Driver Years won 6 Darrell Waltrip 1977, 1981, 1982, 1983, 1984, 1986 5 Richard Petty 1962, 1967, 1968, 1972, 1975 3 Cale Yarborough 1974, 1976, 1978 Geoff Bodine 1989, 1992, 1994 2 Rex White 1960, 1961 Marvin Panch 1963, 1964 Junior Johnson 1958, 1965 Bobby Allison 1973, 1980 Rusty Wallace 1988, 1993 Mark Martin 1990, 1995

Multiple winners (teams)