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The Owens Corning AttiCat 300 was a NASCAR Xfinity Series standalone race held in the summer at Chicagoland Speedway in Joliet, Illinois. It replaced the race at Gateway International Raceway as a part of the 2011 changes to the series schedule. The race was replaced with a race at Pocono Raceway for the 2016 season.

Past winners

Year	Date	No.	Driver	Team	Manufacturer	Race Distance		Race Time	Average Speed (mph)	Ref
Year	Date	No.	Driver	Team	Manufacturer	Laps	Miles (km)	Race Time	Average Speed (mph)	Ref
2011	June 4	31	Justin Allgaier	Turner Motorsports	Chevrolet	200	300 (482.803)	2:06:56	141.807	^[1]
2012	July 22	2	Elliott Sadler	Richard Childress Racing	Chevrolet	201*	301.5 (485.217)	2:18:10	130.929	^[2]
2013	July 21	22	Joey Logano	Penske Racing	Ford	200	300 (482.803)	2:23:13	125.684	^[3]
2014	July 19	9	Chase Elliott	JR Motorsports	Chevrolet	200	300 (482.803)	2:02:38	146.779	^[4]
2015	June 21*	54	Erik Jones	Joe Gibbs Racing	Toyota	200	300 (482.803)	2:31:30	118.812	^[5]

2012: Race extended due to a green–white–checker finish.^[6]
2015: Race postponed from Saturday night to Sunday due to rain and thunderstorm.^[7]

# Wins	Make	Years Won	Ref
3	Chevrolet	2011, 2012, 2014	^[1]^[2]^[4]
1	Ford	2013	^[3]
1	Toyota	2015	^[5]

^ ^a ^b "2011 STP 300". Racing-Reference. Retrieved October 20, 2021.
^ ^a ^b "2012 STP 300". Racing-Reference. Retrieved October 20, 2021.
^ ^a ^b "2013 STP 300". Racing-Reference. Retrieved October 20, 2021.
^ ^a ^b "2014 EnjoyIllinois.com 300". Racing-Reference. Retrieved October 20, 2021.
^ ^a ^b "2015 Owens Corning AttiCat 300". Racing-Reference. Retrieved October 20, 2021.
^ "Ill Sadler holds off Stenhouse after late caution, wins STP 300 at Chicagoland". CBS Sports. 2012-07-22. Retrieved 2013-07-21.
^ Jensen, Tom (June 20, 2015). "RAIN POSTPONES XFINITY SERIES RACE TO SUNDAY". NASCAR. Retrieved June 20, 2015.