2021 Road Race Showcase at Road America

Eighth round of the 2021 IMSA SportsCar Championship Season

The 2021 Road Race Showcase at Road America was a sports car race sanctioned by the International Motor Sports Association (IMSA). The Race was held at Road America in Elkhart Lake, Wisconsin on August 8, 2021. The race was the eighth round of the 2021 IMSA SportsCar Championship and the fifth round of the WeatherTech Sprint Cup.

Background

International Motor Sports Association's (IMSA) president John Doonan confirmed the race was part of the schedule for the 2021 IMSA SportsCar Championship (IMSA SCC) in September 2020. It was the eighth consecutive year it was part of the IMSA SportsCar Championship.^[1] The 2021 Road Race Showcase at Road America was the eighth of twelve scheduled sports car races of 2021 by IMSA, and it was the fifth round held as part of the WeatherTech Sprint Cup.^[2] The race was held at the ten-turn 4.048 mi (6.515 km) Road America in Elkhart Lake, Wisconsin on August 8, 2021.^[3]

During this race weekend, IMSA holds their "State of the Series" annual press conference, in which they confirm and announce their future plans for the series they sanction.

On August 3, 2021, IMSA released the latest technical bulletin outlining Balance of Performance for the event.^[4] In DPi, the Mazda RT24-P received a 10 kilogram weight increase. In GTD, the Lexus RC F GT3 received a 10 kilogram weight increase. The Aston Martin Vantage GT3 was given a 6.7 horsepower reduction. The Audi R8 LMS GT3 Evo and BMW M6 GT3 were given fuel capacity reduction of 1 and 2 liters, respectively. No changes were made in GTLM.

Before the race, Filipe Albuquerque and Ricky Taylor led the DPi Drivers' Championship with 2068 points, ahead of Oliver Jarvis and Harry Tincknell in second with 1987 points, and Pipo Derani and Felipe Nasr with 1954 points.^[5] In LMP2, Mikkel Jensen and Ben Keating led the Drivers' Championship with 1087 points, ahead of Tristan Nunez and Steven Thomas.^[5] With 1468 points, Gar Robinson led the LMP3 Drivers' Championship, 96 points ahead of Jon Bennett and Colin Braun.^[5] Antonio García and Jordan Taylor led the GTLM Drivers' Championship with 1852 points, 191 points ahead of Tommy Milner and Nick Tandy followed by Cooper MacNeil in third.^[5] With 1606 points, the GTD Drivers' Championship was led by Roman De Angelis and Ross Gunn, ahead of Bill Auberlen and Robby Foley.^[5] Cadillac, Chevrolet, and Aston Martin were leading their respective Manufacturers' Championships, while WTR-Konica Minolta Acura, PR1/Mathiasen Motorsports, Riley Motorsports, Corvette Racing, and Heart of Racing Team each led their own Teams' Championships.^[5]

Entries

A total 35 cars took part in the event split across five classes. 6 were entered in DPi, 4 in LMP2, 7 in LMP3, 3 in GTLM, and 15 in GTD.^[6] Ryan Dalziel substituted for Kyle Tilley in the Era Motorsport entry due to a clash with the NASCAR Cup Series round at Watkins Glen.^[7] Jr III Motorsports and Wulver Motorsports made their IMSA SportsCar Championship debuts at this event while Dawson Racing was absent. Dan Goldburg returned to the #38 Performance Tech Motorsports entry after Mateo Llarena filled in at Watkins Glen. NTE Sport returned after skipping the Lime Rock round.^[8]

Practice

There were two practice sessions preceding the start of the race on Sunday, one on Friday and one on Saturday.^[9] The first session on Friday afternoon lasted one hour while the second session on Saturday morning lasted 105 minutes.

Practice 1

The first practice session took place at 6:10 PM CT on Friday and ended with Harry Tincknell topping the charts for Mazda Motorsports, with a lap time of 2:09.769.^[10]

Pos.	Class	No.	Team	Driver	Time	Gap
1	DPi	55	Mazda Motorsports	Harry Tincknell	2:09.769	_
2	DPi	10	Konica Minolta Acura	Filipe Albuquerque	2:10.168	+0.399
3	DPi	01	Cadillac Chip Ganassi Racing	Kevin Magnussen	2:10.577	+0.808
Source:^[11]

Practice 2

The second and final practice session took place at 9:55 AM CT on Saturday and ended with Ricky Taylor topping the charts for Konica Minolta Acura, with a lap time of 1:49.752.^[12]

Pos.	Class	No.	Team	Driver	Time	Gap
1	DPi	10	Konica Minolta Acura	Ricky Taylor	1:49.752	_
2	DPi	31	Whelen Engineering Racing	Felipe Nasr	1:50.411	+0.659
3	DPi	5	JDC-Mustang Sampling Racing	Tristan Vautier	1:50.556	+0.804
Source:^[13]

Qualifying

Qualifying was broken into four sessions.^[9] Rain fell and increased as qualifying progressed.^[14]^[15] The first was for cars in GTD class. Aaron Telitz's No. 14 Lexus was fastest overall, lapping at 2 minutes, 07.195 seconds, beating Trent Hindman's No. 16 Porsche by more than six-tenths of a second. Robby Foley was third in the No. 96 BMW followed by Zacharie Robichon in the No. 9 Pfaff Motorsports Porsche.^[16]

The second session was for cars in the GTLM and GTD classes. Jordan Taylor's No. 3 Corvette was 26th overall, and was the fastest GTLM car with a 2 minutes, 20.979 second laps. His teammate Nick Tandy qualified the No. 4 Corvette the GTLM grid's front row and Cooper MacNeil's No. 79 Porsche was third.^[15]^[17] Laurens Vanthoor set the fastest time in the GTD points paying session and earned 35 championship points.^[16]

The third session was for cars in the LMP3 class. Dan Goldburg's No. 38 Performance Tech Motorsports Ligier was 23rd overall and was the fastest LMP3 car with a 2 minutes, 19.106 seconds lap.^[14]

The final session of qualifying was for cars in the DPi and LMP2 classes. Felipe Nasr's No. 31 Cadillac was third overall and would start from began from pole position with a 2 minutes, 7.195 seconds lap. He was seven-tenths clear of Ricky Taylor's No. 10 Acura in second. Kevin Magnussen took third for Cadillac Chip Ganassi Racing. Ben Keating's No. 52 Oreca was 22nd overall and was the fastest LMP2 car with a 2 minutes, 18.511 seconds lap. Steven Thomas' No. 11 WIN Autosport Oreca took third and John Farano's No. 8 Tower Motorsport Oreca was third.^[17]

Qualifying results

Pole positions in each class are indicated in bold and by ‡.

Pos.	Class	No.	Team	Driver	Time	Gap	Grid
1	GTD	14	Vasser Sullivan Racing	Aaron Telitz	2:07.195	_	21‡
2	GTD	16	Wright Motorsports	Trent Hindman	2:07.862	+0.667	22
3	DPi	31	Whelen Engineering Racing	Felipe Nasr	2:07.919	+0.724	1‡
4	GTD	96	Turner Motorsport	Robby Foley	2:07.953	+0.758	23
5	GTD	9	Pfaff Motorsports	Zacharie Robichon	2:08.209	+1.014	24
6	GTD	39	CarBahn Motorsports with Peregrine Racing	Richard Heistand	2:08.341	+1.146	25
7	GTD	23	Heart Of Racing Team	Roman De Angelis	2:08.569	+1.374	26
8	DPi	10	WTR-Konica Minolta Acura	Ricky Taylor	2:08.677	+1.482	2
9	GTD	12	Vasser Sullivan Racing	Frankie Montecalvo	2:08.702	+1.507	27
10	DPi	55	Mazda Motorsports	Oliver Jarvis	2:08.716	+1.521	3
11	GTD	1	Paul Miller Racing	Madison Snow	2:09.110	+1.915	28
12	DPi	01	Cadillac Chip Ganassi Racing	Kevin Magnussen	2:09.194	+1.999	4
13	GTD	76	Compass Racing	Jeff Kingsley	2:09.321	+2.126	29
14	GTD	32	Gilbert Korthoff Motorsports	Shane Lewis	2:09.990	+2.795	30
15	GTD	88	Team Hardpoint EBM	Rob Ferriol	2:10.173	+2.978	31
16	GTD	66	Gradient Racing	Till Bechtolsheimer	2:10.263	+3.068	32
17	GTD	19	GRT Grasser Racing Team	Misha Goikhberg	2:10.266	+3.071	33
18	DPi	5	JDC-Mustang Sampling Racing	Tristan Vautier	2:10.497	+3.302	5
19	DPi	60	Meyer Shank Racing with Curb-Agajanian	Olivier Pla	2:10.500	+3.305	6
20	GTD	44	Magnus Racing with Archangel Motorsports	John Potter	2:12.194	+4.999	34
21	GTD	42	NTE Sport	Don Yount	2:14.383	+7.188	35
22	LMP2	52	PR1/Mathiasen Motorsports	Ben Keating	2:18.511	+11.316	7‡
23	LMP3	38	Performance Tech Motorsports	Dan Goldburg	2:19.106	+11.911	11‡
24	LMP3	74	Riley Motorsports	Gar Robinson	2:19.419	+12.224	12
25	LMP2	11	WIN Autosport	Steven Thomas	2:19.941	+12.746	8
26	GTLM	3	Corvette Racing	Jordan Taylor	2:20.979	+13.784	18‡
27	LMP3	36	Andretti Autosport	Jarett Andretti	2:21.170	+13.975	13
28	GTLM	4	Corvette Racing	Nick Tandy	2:21.606	+14.411	19
29	LMP3	54	CORE Autosport	Jon Bennett	2:21.885	+14.690	14
30	LMP3	61	Wulver Motorsports	Augie Pabst	2:22.170	+14.975	15
31	GTLM	79	WeatherTech Racing	Cooper MacNeil	2:24.174	+14.979	20
32	LMP2	8	Tower Motorsport By Starworks	John Farano	2:24.176	+14.981	9
33	LMP3	30	Jr III Motorsports	Theodor Olsen	2:24.600	+17.405	17
34	LMP3	91	Riley Motorsports	Jim Cox	2:25.260	+18.065	17
35	LMP2	18	Era Motorsport	Dwight Merriman	2:27.462	+20.267	10
Sources:^[18]^[19]^[20]^[21]^[22]

Race

Post-race

As a result of winning the race, Derani and Nasr advanced from third to second in the DPi Drivers' Championship.^[23] The result kept Keating and Jensen atop the LMP2 Drivers' Championship.^[23] The result of the race meant Robinson was still in the lead of the LMP3 Drivers' Championship with 1800 points, but his advantage was reduced to 50 points as a result of Bennett and Braun's victory.^[23] The result kept Antonio García and Jordan Taylor atop the GTLM Drivers' Championship.^[23] As a result of finishing second place, Auberlen and Foley re took the lead of the GTD Drivers' Championship from De Angelis and Gunn. Robichon and Vanthoor advanced from fourth to third while Sellers and Snow dropped from third to fourth.^[23] Cadillac, Chevrolet, and Aston Martin continued to top their respective Manufacturers' Championships while WTR-Konica Minolta Acura, PR1/Mathiasen Motorsports, Riley Motorsports, and Corvette Racing kept their respective advantages in the their respective of Teams' Championships. Turner Motorsport took the lead of the GTD Teams' Championship with four rounds remaining in the season.^[23]

Race results

Class winners are denoted in bold and ‡.

Pos	Class	No.	Team	Drivers	Chassis	Laps	Time/Retired
Pos	Class	No.	Team	Drivers	Engine	Laps	Time/Retired
1	DPi	31	Whelen Engineering Racing	Felipe Nasr Pipo Derani	Cadillac DPi-V.R	76	2:40:24.362‡
1	DPi	31	Whelen Engineering Racing	Felipe Nasr Pipo Derani	Cadillac 5.5L V8	76	2:40:24.362‡
2	DPi	55	Mazda Motorsports	Oliver Jarvis Harry Tincknell	Mazda RT24-P	76	+1.594
2	DPi	55	Mazda Motorsports	Oliver Jarvis Harry Tincknell	Mazda MZ-2.0T 2.0L Turbo I4	76	+1.594
3	DPi	01	Cadillac Chip Ganassi Racing	Renger van der Zande Kevin Magnussen	Cadillac DPi-V.R	76	+5.770
3	DPi	01	Cadillac Chip Ganassi Racing	Renger van der Zande Kevin Magnussen	Cadillac 5.5L V8	76	+5.770
4	DPi	10	Konica Minolta Acura	Ricky Taylor Filipe Albuquerque	Acura ARX-05	76	+46.781
4	DPi	10	Konica Minolta Acura	Ricky Taylor Filipe Albuquerque	Acura AR35TT 3.5L Turbo V6	76	+46.781
5	DPi	60	Meyer Shank Racing with Curb-Agajanian	Dane Cameron Olivier Pla	Acura ARX-05	76	+49.018
5	DPi	60	Meyer Shank Racing with Curb-Agajanian	Dane Cameron Olivier Pla	Acura AR35TT 3.5L Turbo V6	76	+49.018
6	DPi	5	JDC-Mustang Sampling Racing	Tristan Vautier Loïc Duval	Cadillac DPi-V.R	76	+1:53.142
6	DPi	5	JDC-Mustang Sampling Racing	Tristan Vautier Loïc Duval	Cadillac 5.5L V8	76	+1:53.142
7	LMP2	18	Era Motorsport	Dwight Merriman Ryan Dalziel	Oreca 07	75	+1 Lap‡
7	LMP2	18	Era Motorsport	Dwight Merriman Ryan Dalziel	Gibson GK428 4.2 L V8	75	+1 Lap‡
8	LMP2	8	Tower Motorsport By Starworks	John Farano Gabriel Aubry	Oreca 07	75	+1 Lap
8	LMP2	8	Tower Motorsport By Starworks	John Farano Gabriel Aubry	Gibson GK428 4.2 L V8	75	+1 Lap
9	LMP2	52	PR1/Mathiasen Motorsports	Ben Keating Mikkel Jensen	Oreca 07	75	+1 Lap
9	LMP2	52	PR1/Mathiasen Motorsports	Ben Keating Mikkel Jensen	Gibson GK428 4.2 L V8	75	+1 Lap
10	LMP2	11	WIN Autosport	Tristan Nunez Steven Thomas	Oreca 07	74	Out of Fuel
10	LMP2	11	WIN Autosport	Tristan Nunez Steven Thomas	Gibson GK428 4.2 L V8	74	Out of Fuel
11	LMP3	54	CORE Autosport	Jon Bennett Colin Braun	Ligier JS P320	73	+3 Laps‡
11	LMP3	54	CORE Autosport	Jon Bennett Colin Braun	Nissan VK56DE 5.6 L V8	73	+3 Laps‡
12	GTLM	79	WeatherTech Racing	Cooper MacNeil Matt Campbell	Porsche 911 RSR-19	73	+3 Laps‡
12	GTLM	79	WeatherTech Racing	Cooper MacNeil Matt Campbell	Porsche 4.2L Flat-6	73	+3 Laps‡
13	LMP3	38	Performance Tech Motorsports	Dan Goldburg Rasmus Lindh	Ligier JS P320	73	+3 Laps
13	LMP3	38	Performance Tech Motorsports	Dan Goldburg Rasmus Lindh	Nissan VK56DE 5.6 L V8	73	+3 Laps
14	GTLM	3	Corvette Racing	Antonio García Jordan Taylor	Chevrolet Corvette C8.R	73	+3 Laps
14	GTLM	3	Corvette Racing	Antonio García Jordan Taylor	Chevrolet 5.5L V8	73	+3 Laps
15	LMP3	74	Riley Motorsports	Gar Robinson Felipe Fraga	Ligier JS P320	72	+4 Laps
15	LMP3	74	Riley Motorsports	Gar Robinson Felipe Fraga	Nissan VK56DE 5.6 L V8	72	+4 Laps
16	LMP3	91	Riley Motorsports	Jim Cox Dylan Murry	Ligier JS P320	72	+4 Laps
16	LMP3	91	Riley Motorsports	Jim Cox Dylan Murry	Nissan VK56DE 5.6 L V8	72	+4 Laps
17	GTLM	4	Corvette Racing	Tommy Milner Nick Tandy	Chevrolet Corvette C8.R	72	+4 Laps
17	GTLM	4	Corvette Racing	Tommy Milner Nick Tandy	Chevrolet 5.5L V8	72	+4 Laps
18	LMP3	36	Andretti Autosport	Jarett Andretti Oliver Askew	Ligier JS P320	72	+4 Laps
18	LMP3	36	Andretti Autosport	Jarett Andretti Oliver Askew	Nissan VK56DE 5.6 L V8	72	+4 Laps
19	LMP3	61	Wulver Motorsports	Tõnis Kasemets Augie Pabst	Ligier JS P320	71	+5 Laps
19	LMP3	61	Wulver Motorsports	Tõnis Kasemets Augie Pabst	Nissan VK56DE 5.6 L V8	71	+5 Laps
20	GTD	9	Pfaff Motorsports	Zacharie Robichon Laurens Vanthoor	Porsche 911 GT3 R	69	+7 Laps‡
20	GTD	9	Pfaff Motorsports	Zacharie Robichon Laurens Vanthoor	Porsche 4.0L Flat-6	69	+7 Laps‡
21	GTD	96	Turner Motorsport	Bill Auberlen Robby Foley	BMW M6 GT3	69	+6 Laps
21	GTD	96	Turner Motorsport	Bill Auberlen Robby Foley	BMW 4.4L Turbo V8	69	+6 Laps
22	GTD	16	Wright Motorsports	Trent Hindman Patrick Long	Porsche 911 GT3 R	69	+7 Laps
22	GTD	16	Wright Motorsports	Trent Hindman Patrick Long	Porsche 4.0L Flat-6	69	+7 Laps
23	GTD	23	Heart of Racing Team	Roman De Angelis Ross Gunn	Aston Martin Vantage GT3	69	+7 Laps
23	GTD	23	Heart of Racing Team	Roman De Angelis Ross Gunn	Mercedes-Benz M177 4.0 L Turbo V8	69	+7 Laps
24	GTD	14	Vasser-Sullivan Racing	Aaron Telitz Jack Hawsworth	Lexus RC F GT3	68	+8 Laps
24	GTD	14	Vasser-Sullivan Racing	Aaron Telitz Jack Hawsworth	Lexus 5.0L V8	68	+8 Laps
25	GTD	12	Vasser-Sullivan Racing	Frankie Montecalvo Zach Veach	Lexus RC F GT3	68	+8 Laps
25	GTD	12	Vasser-Sullivan Racing	Frankie Montecalvo Zach Veach	Lexus 5.0L V8	68	+8 Laps
26	GTD	1	Paul Miller Racing	Bryan Sellers Madison Snow	Lamborghini Huracán GT3 Evo	68	+8 Laps
26	GTD	1	Paul Miller Racing	Bryan Sellers Madison Snow	Lamborghini 5.2L V10	68	+8 Laps
27	GTD	88	Team Hardpoint EBM	Rob Ferriol Katherine Legge	Porsche 911 GT3 R	68	+8 Laps
27	GTD	88	Team Hardpoint EBM	Rob Ferriol Katherine Legge	Porsche 4.0L Flat-6	68	+8 Laps
28	GTD	66	Gradient Racing	Till Bechtolsheimer Marc Miller	Acura NSX GT3 Evo	68	+8 Laps
28	GTD	66	Gradient Racing	Till Bechtolsheimer Marc Miller	Acura 3.5L Turbo V6	68	+8 Laps
29	GTD	39	CarBahn with Peregrine Racing	Richard Heistand Jeff Westphal	Audi R8 LMS Evo	68	+8 Laps
29	GTD	39	CarBahn with Peregrine Racing	Richard Heistand Jeff Westphal	Audi 5.2L V10	68	+8 Laps
30	GTD	42	NTE Sport	J.R. Hildebrand Don Yount	Audi R8 LMS Evo	68	+8 Laps
30	GTD	42	NTE Sport	J.R. Hildebrand Don Yount	Audi 5.2L V10	68	+8 Laps
31	GTD	76	Compass Racing	Jeff Kingsley Mario Farnbacher	Acura NSX GT3 Evo	67	+9 Laps
31	GTD	76	Compass Racing	Jeff Kingsley Mario Farnbacher	Acura 3.5L Turbo V6	67	+9 Laps
32 DNF	GTD	44	Magnus Racing with Archangel Motorsports	John Potter Andy Lally	Acura NSX GT3 Evo	62	Lost Wheel
32 DNF	GTD	44	Magnus Racing with Archangel Motorsports	John Potter Andy Lally	Acura 3.5L Turbo V6	62	Lost Wheel
33 DNF	GTD	32	Gilbert Korthoff Motorsports	Guy Cosmo Shane Lewis	Mercedes-AMG GT3 Evo	46	Suspension
33 DNF	GTD	32	Gilbert Korthoff Motorsports	Guy Cosmo Shane Lewis	Mercedes-AMG M159 6.2L V8	46	Suspension
34 DNF	GTD	19	GRT Grasser Racing Team	Misha Goikhberg Franck Perera	Lamborghini Huracán GT3 Evo	24	Rear End
34 DNF	GTD	19	GRT Grasser Racing Team	Misha Goikhberg Franck Perera	Lamborghini 5.2L V10	24	Rear End
35 DNF	LMP3	30	Jr III Motorsports	Theodor Olsen Mike Skeen	Ligier JS P320	8	Rear Axle
35 DNF	LMP3	30	Jr III Motorsports	Theodor Olsen Mike Skeen	Nissan VK56DE 5.6 L V8	8	Rear Axle
Sources:^[24]^[25]

Standings after the race

DPi Drivers' Championship standings^[23]
Pos.	+/–	Driver	Points
1		Filipe Albuquerque Ricky Taylor	2380
2	1	Pipo Derani Felipe Nasr	2339
3	1	Oliver Jarvis Harry Tincknell	2337
4		Kevin Magnussen Renger van der Zande	2177
5		Dane Cameron Olivier Pla	2078

LMP2 Drivers' Championship standings^[23]
Pos.	+/–	Driver	Points
1		Mikkel Jensen Ben Keating	1422
2		Tristan Nunez Steven Thomas	1364
3		Gabriel Aubry John Farano	1314
4	2	Ryan Dalziel Dwight Merriman	1018
5	1	Scott Huffaker	702

LMP3 Drivers' Championship standings^[23]
Pos.	+/–	Driver	Points
1		Gar Robinson	1800
2		Jon Bennett Colin Braun	1750
3		Jim Cox Dylan Murry	1594
4	1	Rasmus Lindh	1538
5	1	Oliver Askew	1504

GTLM Drivers' Championship standings^[23]
Pos.	+/–	Driver	Points
1		Antonio García Jordan Taylor	2207
2		Tommy Milner Nick Tandy	1993
3		Cooper MacNeil	1984
4	2	Matt Campbell	1372
5	1	John Edwards Augusto Farfus Jesse Krohn	1001

GTD Drivers' Championship standings^[23]
Pos.	+/–	Driver	Points
1	1	Bill Auberlen Robby Foley	1930
2	1	Roman De Angelis Ross Gunn	1912
3	1	Zacharie Robichon Laurens Vanthoor	1830
4	1	Madison Snow Bryan Sellers	1806
5		Patrick Long	1712

Note: Only the top five positions are included for all sets of standings.

DPi Teams' Championship standings^[23]
Pos.	+/–	Team	Points
1		#10 WTR-Konica Minolta Acura	2380
2	1	#31 Whelen Engineering Racing	2339
3	1	#55 Mazda Motorsports	2337
4		#01 Cadillac Chip Ganassi Racing	2177
5		#60 Meyer Shank Racing w/ Curb-Agajanian	2078

LMP2 Teams' Championship standings^[23]
Pos.	Team	Points
1	#52 PR1 Mathiasen Motorsports	1422
2	#11 WIN Autosport	1364
3	#8 Tower Motorsport	1314
4	#18 Era Motorsport	1018
5	#22 United Autosports	614

LMP3 Teams' Championship standings^[23]
Pos.	Team	Points
1	#74 Riley Motorsports	1800
2	#54 CORE Autosport	1750
3	#91 Riley Motorsports	1594
4	#38 Performance Tech Motorsports	1538
5	#36 Andretti Autosport	1192

GTLM Teams' Championship standings^[23]
Pos.	Team	Points
1	#3 Corvette Racing	2207
2	#4 Corvette Racing	1993
3	#79 WeatherTech Racing	1984
4	#24 BMW Team RLL	1001
5	#25 BMW Team RLL	966

GTD Teams' Championship standings^[23]
Pos.	+/–	Team	Points
1	1	#96 Turner Motorsport	1930
2	1	#23 Heart of Racing Team	1912
3	1	#9 Pfaff Motorsports	1830
4	1	#1 Paul Miller Racing	1806
5		#16 Wright Motorsports	1712

Note: Only the top five positions are included for all sets of standings.

DPi Manufacturers' Championship standings^[23]
Pos.	Manufacturer	Points
1	Cadillac	2574
2	Acura	2486
3	Mazda	2409

GTLM Manufacturers' Championship standings^[23]
Pos.	Manufacturer	Points
1	Chevrolet	2230
2	Porsche	2108
3	BMW	1052
4	Ferrari	330

GTD Manufacturers' Championship standings^[23]
Pos.	+/–	Manufacturer	Points
1		Aston Martin	1984
2	1	BMW	1979
3	1	Porsche	1964
4	2	Lamborghini	1923
5		Lexus	1849

Note: Only the top five positions are included for all sets of standings.

References

^ Pruett, Marshall (September 9, 2020). "IMSA reveals 2021 WeatherTech Championship calendar". racer.com. Retrieved July 26, 2023.
^ Pruett, Marshall (March 4, 2021). "IMSA moves VIR, Petit Le Mans after Le Mans 24 date change". racer.com. Retrieved October 13, 2023.
^ Malsher-Lopez, David (September 9, 2020). "IMSA reveals 2021 schedule, LMP3 to join WeatherTech series". us.motorsport.com. Retrieved July 26, 2023.
^ Dagys, John (August 3, 2021). "Mazda Handed Weight Increase for Road America". sportscar365.com. Retrieved April 21, 2023.
^ ^a ^b ^c ^d ^e ^f "00_Championship Points - Official.pdf" (PDF). results.imsa.com. July 20, 2021. Retrieved August 28, 2023.
^ Dagys, John (July 28, 2021). "New LMP3 Teams Boost Road America Entry". sportscar365.com. Retrieved April 21, 2023.
^ Dagys, John (August 6, 2021). "Road America Friday Notebook". sportscar365.com. Retrieved April 21, 2023.
^ Dagys, John (July 23, 2021). "Hildebrand Returns in NTE Sport Audi for Road America". sportscar365.com. Retrieved April 21, 2023.
^ ^a ^b "2021 IMSA Official Schedule and SR Road America 072821 V1" (PDF). results.imsa.com/noticeBoard.php. Retrieved October 13, 2023.
^ Kish, Ryan (August 6, 2021). "Tincknell leads rain-shortened opening practice at Road America". racer.com. Retrieved April 21, 2023.
^ "03_Results_Practice 201.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ Dagys, John (August 7, 2021). "Taylor Tops Second Practice at Road America". sportscar365.com. John Dagys Media. Retrieved April 21, 2023.
^ "03_Results_Practice 202.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ ^a ^b "Nasr Scores Pole In Whelen Cadillac As Weather Plays A Part". dailysportscar.com. August 8, 2021. Retrieved October 13, 2023.
^ ^a ^b Kish, Ryan (August 7, 2021). "Rain riles Road America qualifiers". racer.com. Retrieved October 13, 2023.
^ ^a ^b Dagys, John (August 7, 2021). "Nasr Takes Pole in Wet, Wild Road America Qualifying". sportscar365.com. Retrieved October 13, 2023.
^ ^a ^b Bradley, Charles (August 7, 2021). "Road America IMSA: Felipe Nasr takes pole in AXR Cadillac". motorsport.com. Retrieved October 13, 2023.
^ "LMP2-DPi 20Position 20and 20Points.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ "LMP3 20Position 20and 20Points.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ "03_Results_Qualifying 20-20GTD 20Points 20-20GTLM 20Position 20- 20Points.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ "03_Results_Qualifying 20-20GTD 20Position.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ "01_Grid_Race_Official.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s "00_Championship Points - Official.pdf" (PDF). results.imsa.com. August 10, 2021. Retrieved August 28, 2023.
^ "03_Results_Race_Official.PDF" (PDF). results.imsa.com. Retrieved April 21, 2023.
^ "2021 IMSA SPORTSCAR WEEKEND". racing-reference.info. Retrieved August 28, 2023.