2021 GT4 America Series

The 2021 Pirelli GT4 America Series is the third season of the GT4 America Series. The season began on 5 March at Sonoma Raceway and ended on 17 October at Indianapolis Motor Speedway.

Calendar[]

The final calendar was announced on 3 October 2020, featuring seven rounds.^[1] The round at Canadian Tire Motorsports Park was later canceled.^[2] In June, Sebring International Raceway was announced as the CTMP round's replacement.^[3]

Round	Circuit	Date
1	Sonoma Raceway, Sonoma, California	5–7 March
2	Circuit of the Americas, Elroy, Texas	30 April-2 May
3	Virginia International Raceway, Alton, Virginia	11–13 June
4	Road America, Elkhart Lake, Wisconsin	27–29 August
5	Watkins Glen International, Watkins Glen, New York	17–19 September
6	Sebring International Raceway, Sebring, Florida	1–3 October
7	Indianapolis Motor Speedway, Speedway, Indiana	15–17 October
Cancelled due to the COVID-19 pandemic
	Circuit	Original Date
	Canadian Tire Motorsports Park, Bowmanville, Ontario	21–23 May

Entry list[]

Team Car No. Drivers Class Rounds Notlad Racing by RS1[4] Aston Martin Vantage AMR GT4 00 Matt Dalton[4] PA 1–3 Patrick Gallagher[4] RS1[5] 37 Charlie Belluardo[5] PA 5 Trent Hindman[5] Automatic Racing Aston Martin Vantage AMR GT4 09 Paul Kiebler Am 4–7 Mikel Miller Dexter Racing[4] Aston Martin Vantage AMR GT4 062 Ryan Dexter[4] S All Warren Dexter[4] GMG Racing[6] Aston Martin Vantage AMR GT4 2 Jason Bell[6] PA All Andrew Davis[6] Audi R8 LMS GT4 Evo 8 Andy Lee[6] PA 1–2, 6 Elias Sabo[6] Motorsport USA[4] McLaren 570S GT4 5 Michael McAleenan[4] Am 1–2, 4–5 Jerold Lowe 1 Dan Rogers[4] 2, 4–5 23 Cavan O'Keefe[4] Am 1–2, 4 Memo Gidley[4] 1 Jason Alexandridis 4 Jerold Lowe[7] 2 111 Todd Clarke[4] Am 1–2, 4–5 Ty Clarke[4] Nolasport with OGH[4] Porsche 718 Cayman GT4 Clubsport 7 Sean Gibbons[4] Am All Sam Owens[4] Nolasport[4] 46 Russell Walker[4] Am 1–6 Patrick Byrne[4] 1 David Walker[7] 2–6 47 Jason Hart[4] PA All Matt Travis[4] 48 Dominic Starkweather Am 4–5 Anthony Geraci 4 Jason Alexandridis 5 Classic BMW[7] BMW M4 GT4 11 Toby Grahovec[7] S 2–7 Stevan McAleer[7] BSport Racing[4] Aston Martin Vantage AMR GT4 15 Kenton Koch[4] PA All Bryan Putt[4] Capstone Motorsports[4] Mercedes-AMG GT4 16 Kris Wilson[4] Am All John Allen[4] 1–5, 7 Jon Berry 6 The Racer's Group[4] Porsche 718 Cayman GT4 Clubsport 17 James Rappaport[4] Am 1–4, 7 Robert Orcutt[4] 1 Todd Hetherington[7] 2–4, 7 66 Derek DeBoer[4] PA 1–5, 7 Spencer Pumpelly[4] TGR Forbush Performance[8] Toyota GR Supra GT4 18 Matt Forbush[8] Am All Damon Surzyshyn[8] CCR Racing / Team TFB[4] BMW M4 GT4 22 Tim Barber[4] S All Cole Ciraulo[4] Heart of Racing Team[4] Aston Martin Vantage AMR GT4 24 Ian James[4] PA All Gray Newell[4] ST Racing[9] BMW M4 GT4 28 Ryan Eversley[9] PA 1–2 Joe Rubbo[9] 1–2 Harry Gottsacker S 4 Tyler Maxson 4 38 Bryson Lew[9] S 1, 4 Tomas Mejia[9] 1–4 Nick Wittmer[7] 2–3 Rearden Racing[4] Audi R8 LMS GT4 Evo 29 Dmitri Novikov[10] PA 2 Owen Trinkler[10] 888 Kris McCoy[4] PA 1 Jeff Westphal[4] 1 S 2 Vesko Kozarov[10] 2 Bimmerworld Racing[11] BMW M4 GT4 34 Bill Auberlen[11] PA All James Walker[11] 36 James Clay[11] PA All Nick Galante[11] 94 Chandler Hull[11] S 1–5, 7 Jon Miller[11] Conquest Racing West Mercedes-AMG GT4 35 Michai Stephens S 4–7 Collin Mullan RENNtech Motorsports[12] Mercedes-AMG GT4 39 Chris Cagnazzi[13] PA 2–4, 6–7 Guy Cosmo[13] 79 Christopher Gumprecht PA 4–7 Kyle Marcelli 89 Ross Chouest[12] PA 1–4 Aaron Povoledo[12] PF Racing Ford Mustang GT4 40 Chad McCumbee S 4 James Pesek Murillo Racing[14] Porsche 718 Cayman GT4 Clubsport 43 Aurora Straus[14] Am 1–2 Christina Nielsen[14] 1 Jeff Mosing[7] 2 Mercedes-AMG GT4 72 Kenny Murillo[4] S All Christian Szymczak[4] 3R Povoledo Racing[5] Aston Martin Vantage AMR GT4 50 Ross Chouest[5] PA 5–6 Aaron Povoledo[5] AutoTechnic Racing[15] BMW M4 GT4 52 John Capestro-Dubets[15] PA 2–7 Tom Capizzi[15] Black Swan Racing[4] Porsche Cayman GT4 Clubsport MR 54 Jeroen Bleekemolen[4] PA 1–4, 6 Tim Pappas[4] WR Racing[4] Aston Martin Vantage AMR GT4 59 Paul Terry[4] PA All Brandon Davis[4] 1–4 Owen Trinkler[5] 5–6 Valentin Hasse Clot 7 TGR Smooge Racing[16] Toyota GR Supra GT4 68 Kevin Conway[16] Am All John Geesbreght[16] Marco Polo Motorsports[17] KTM X-Bow GT4 Evo 71 Nicolai Elghanayan[17] S 1–3 Mads Siljehaug[17] Random Vandals Racing[18] BMW M4 GT4 98 Paul Sparta[18] Am All Al Carter[18] 1–2, 4–7 Andrew Wikstrom 3 Stephen Cameron Racing[4] BMW M4 GT4 119 Sean Quinlan[4] PA All Gregory Liefooghe[4] 1–6 Tom Dyer[19] 7 Porsche 718 Cayman GT4 Clubsport 619 Alain Stad Am 4–6 Thomas Merrill 4–5 Robb Todd 6 Premier Racing Porsche 718 Cayman GT4 Clubsport 120 Adam Adelson PA 4–6 Elliot Skeer RHC Jorgensen / Strom[4] BMW M4 GT4 450 Daren Jorgensen[4] PA 1–2 Brett Strom[4] Zelus Motorsports[19][a] Aston Martin Vantage AMR GT4 888 Jason Harward[19] Am 7 Tigh Isaac[19] Sean Whalen[19] CarBahn Motorsports with Peregrine Racing[7] Audi R8 LMS GT4 Evo 930 Tom Dyer[7] PA 2–6 Mark Siegel[7] 2, 4 Tyler McQuarrie 3 Sameer Ghandi[5] 5–6

Icon Class S Silver Cup PA Pro-Am Cup Am Am Cup

Footnotes[]

Race results[]

Bold indicates overall winner.

Round		Circuit	Pole position	Silver Winners	Pro-Am Winners	Am Winners
1	R1	Sonoma	No. 47 Nolasport	No. 062 Dexter Racing	No. 47 Nolasport	No. 46 Nolasport
			Jason Hart Matt Travis	Ryan Dexter Warren Dexter	Jason Hart Matt Travis	Patrick Byrne Russell Walker
	R2		No. 47 Nolasport	No. 72 Murillo Racing	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Jason Hart Matt Travis	Kenny Murillo Christian Szymczak	Jason Hart Matt Travis	Kevin Conway John Geesbreght
2	R1	Austin	No. 47 Nolasport	No. 94 Bimmerworld Racing	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Jason Hart Matt Travis	Chandler Hull Jon Miller	Jason Hart Matt Travis	Kevin Conway John Geesbreght
	R2		No. 47 Nolasport	No. 72 Murillo Racing	No. 47 Nolasport	No. 7 Nolasport with OGH
			Jason Hart Matt Travis	Kenny Murillo Christian Szymczak	Jason Hart Matt Travis	Sean Gibbons Sam Owen
3	R1	Virginia	No. 47 Nolasport	No. 72 Murillo Racing	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Jason Hart Matt Travis	Kenny Murillo Christian Szymczak	Jason Hart Matt Travis	Kevin Conway John Geesbreght
	R2		No. 00 Notlad Racing by RS1	No. 11 Classic BMW	No. 15 BSport Racing	No. 16 Capstone Motorsports
			Matt Dalton Patrick Gallagher	Toby Grahovec Stevan McAleer	Kenton Koch Bryan Putt	John Allen Kris Wilson
4	R1	Road America	No. 11 Classic BMW	No. 72 Murillo Racing	No. 34 Bimmerworld Racing	No. 68 TGR Smooge Racing
			Toby Grahovec Stevan McAleer	Kenny Murillo Christian Szymczak	Bill Auberlen James Walker	Kevin Conway John Geesbreght
	R2		No. 119 Stephen Cameron Racing	No. 28 ST Racing	No. 119 Stephen Cameron Racing	No. 111 Motorsports USA
			Gregory Liefooghe Sean Quinlan	Harry Gottsacker Tyler Maxson	Gregory Liefooghe Sean Quinlan	Todd Clarke Ty Clarke
5	R1	Watkins Glen	No. 16 Capstone Motorsports	No. 72 Murillo Racing	No. 52 AutoTechnic Racing	No. 68 TGR Smooge Racing
			John Allen Kris Wilson	Kenny Murillo Christian Szymczak	John Capestro-Dubets Tom Capizzi	Kevin Conway John Geesbreght
	R2		No. 66 The Racer's Group	No. 11 Classic BMW	No. 24 Heart of Racing Team	No. 68 TGR Smooge Racing
			Derek DeBoer Spencer Pumpelly	Toby Grahovec Stevan McAleer	Ian James Gray Newell	Kevin Conway John Geesbreght
6	R1	Sebring	No. 11 Classic BMW	No. 35 Conquest Racing West	No. 47 Nolasport	No. 98 Random Vandals Racing
			Toby Grahovec Stevan McAleer	Colin Mullan Michai Stephens	Jason Hart Matt Travis	Al Carter Paul Sparta
	R2		No. 34 Bimmerworld Racing	No. 35 Conquest Racing West	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Bill Auberlen James Walker	Colin Mullan Michai Stephens	Jason Hart Matt Travis	Kevin Conway John Geesbreght
7	R1	Indianapolis	No. 11 Classic BMW	No. 35 Conquest Racing West	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Toby Grahovec Stevan McAleer	Colin Mullan Michai Stephens	Jason Hart Matt Travis	Kevin Conway John Geesbreght
	R2		No. 59 WR Racing	No. 35 Conquest Racing West	No. 47 Nolasport	No. 68 TGR Smooge Racing
			Valentin Hasse-Clot Paul Terry	Colin Mullan Michai Stephens	Jason Hart Matt Travis	Kevin Conway John Geesbreght

Championship standings[]

Scoring system

Championship points are awarded for the first ten positions in each race. Entries are required to complete 75% of the winning car's race distance in order to be classified and earn points. Individual drivers are required to participate for a minimum of 25 minutes in order to earn championship points in any SprintX race.

Driver's championships[]

Pos. Driver Team SON AUS VIR ELK WGL SEB IMS Points Silver Cup 1 Kenny Murillo Christian Szymczak Murillo Racing 3 2 Ret 2 1 Ret 5 11 2 9 4 6 2 2 243 2 Tim Barber Cole Ciraulo CCR Racing / Team TFB 8 15 15 18 7 6 6 27 17 7 17 15 12 20 176 3 Colin Mullan Michai Stephens Conquest Racing West 12 14 11 2 1 1 1 1 163 4 Stevan McAleer Toby Grahovec Classic BMW 11 4 5 2 36 Ret 26 1 5 28 3 22 159 5 Ryan Dexter Warren Dexter Dexter Racing 2 4 25 8 Ret DNS 18 26 12 8 8 20 23 4 154 6 Chandler Hull Jon Miller Bimmerworld Racing 18 31 7 Ret 11 7 14 NC 25 11 7 5 122 7 Tomas Mejia ST Racing 27 18 17 12 17 10 22 18 74 8 Nicolai Elghanayan Mads Siljehaug Marco Polo Motorsports 9 6 19 9 14 22 67 9 Nick Wittmer ST Racing 17 12 17 10 40 10 Bryson Lew ST Racing 27 18 22 18 34 11 Harry Gottsacker Tyler Maxson ST Racing 34 7 29 12 Chad McCumbee James Pesek PF Racing 11 17 27 13 Vesko Kozarov Jeff Westphal Rearden Racing 9 22 24 Pro-Am Cup 1 Jason Hart Matt Travis Nolasport 1 1 1 1 2 3 7 15 DNS 6 2 2 4 3 267 2 Kenton Koch Bryan Putt BSport Racing 4 8 18 6 9 1 13 3 6 17 9 8 5 7 158 3 Sean Quinlan Stephen Cameron Racing 6 9 34 3 3 23 8 1 7 Ret 6 7 8 13 141 4 Tom Capizzi John Capestro-Dubets AutoTechnic Racing 5 15 8 19 2 2 1 5 21 10 10 9 128 5 Gregory Liefooghe Stephen Cameron Racing 6 9 34 3 3 23 8 1 7 Ret 6 7 125 6 Bill Auberlen James Walker Bimmerworld Racing 7 27 4 Ret 16 24 1 4 8 4 15 4 9 Ret 110 7 Paul Terry WR Racing 10 3 12 7 4 12 Ret Ret 4 Ret 16 13 6 23† 95 8 Jeroen Bleekemolen Tim Pappas Black Swan Racing 11 7 2 21 Ret DNS 24 5 3 3 85 9 Derek DeBoer Spencer Pumpelly The Racer's Group 19 5 10 14 6 4 4 20 10 27 17 12 75 10 James Clay Nick Galante Bimmerworld Racing 25 12 13 Ret Ret 5 3 23 9 13 7 18 11 8 74 11 Jason Bell Andrew Davis GMG Racing 12 11 6 Ret 13 8 9 12 13 12 13 9 13 10 71 12 Brandon Davis WR Racing 10 3 12 7 4 12 Ret Ret 65 13 Ian James Gray Newell Heart of Racing Team 20 22 20 19 15 21 25 9 3 3 26 27 14 11 63 14 Ross Chouest Aaron Povoledo RENNtech Motorsports 16 16 3 5 22 25 17 DNS 49 3R Povoledo Racing 5 20 14 DNS 15 Chris Cagnazzi Guy Cosmo RENNtech Motorsports 36 Ret 10 17 10 DNS 11 12 15 14 26 16 Tom Dyer CarBahn Motorsports with Peregrine Racing 32 30 19 8 DNS 25 22 25 24 Stephen Cameron Racing 8 13 17 Adam Adelson Elliot Skeer Premier Racing 21 16 14 28 12 5 17 18 Owen Trinkler Rearden Racing 24 29 15 WR Racing 4 Ret 16 13 18 Valentin Hasse-Clot WR Racing 6 23† 15 19 Charlie Belluardo Trent Hindman RS1 Ret 10 10 19 Mark Siegel CarBahn Motorsports with Peregrine Racing 32 30 21 20 19 8 10 19 Christopher Gumprecht Kyle Marcelli RENNtech Motorsports DNS 22 16 24 10 16 Ret 15 10 20 Ryan Eversley Joe Rubbo ST Racing 24 25 35 10 8 20 Matt Dalton Patrick Gallagher Notlad Racing by RS1 14 33 Ret 25 12 DNS 8 21 Kris McCoy Jeff Westphal Rearden Racing 23 10 6 22 Andy Lee Elias Sabo GMG Racing 29 26 16 26 25 11 3 23 Tyler McQuarrie CarBahn Motorsports with Peregrine Racing 21 20 2 Daren Jorgensen Brett Strom RHC Jorgensen / Storm 30 32 28 28 0 Dmitri Novikov Rearden Racing 24 29 0 Sameer Ghandi CarBahn Motorsports with Peregrine Racing DNS 25 22 25 0 Am Cup 1 Kevin Conway John Geesbreght TGR Smooge Racing 15 13 8 17 18 11 15 10 15 14 20 14 16 18 303 2 Kris Wilson Capstone Motorsports 13 14 14 Ret 20 9 30 19 Ret 15 19 26 22 18 168 3 Paul Sparta Random Vandals Racing 28 30 21 20 19 13 23 Ret 19 26 18 17 Ret 16 152 4 John Allen Capstone Motorsports 13 14 14 Ret 20 9 30 19 Ret 15 126 5 Russell Walker Nolasport 5 17 27 23 Ret 16 20 30 18 16 Ret 23 119 5 Al Carter Random Vandals Racing 28 30 21 20 23 Ret 19 26 18 17 Ret 16 119 6 Sean Gibbons Sam Owens Nolasport with OGH 26 24 26 11 Ret 14 35 32 20 19 28 21 Ret Ret 95 7 Matt Forbush Damon Surzyshyn TGR Forbush Performance 32 29 30 27 23 18 28 24 DNS DNS 23 24 20 19 80 8 David Walker Nolasport 27 23 Ret 16 20 30 18 16 Ret 23 79 9 Alain Stad Stephen Cameron Racing 16 13 21 18 27 19 78 10 Todd Clarke Ty Clarke Motorsports USA 21 23 23 31 31 6 22 21 70 11 Michael McAleenan Motorsports USA 17 21 29 16 27 21 23 22 69 12 Thomas Merrill Stephen Cameron Racing 16 13 21 18 55 13 Paul Kiebler Mikel Miller Automatic Racing 29 29 24 23 24 22 18 Ret 52 14 Jerold Lowe Motorsports USA 17 21 22 13 50 15 Dan Rogers Motorsports USA 29 16 27 21 23 22 49 16 Cavan O'Keefe Motorsports USA 22 20 22 13 33 31 48 17 James Rappaport The Racer's Group 31 28 33 Ret 24 15 32 28 21 21 46 18 Jon Berry Capstone Motorsports 19 26 22 18 42 18 Todd Hetherington The Racer's Group 33 Ret 24 15 32 28 21 21 42 19 Patrick Byrne Nolasport 5 17 40 20 Andrew Wikstrom Random Vandals Racing 19 13 33 21 Tigh Isaac Zelus Motorsports 19 17 30 22 Robb Todd Stephen Cameron Racing 27 19 23 23 Aurora Straus Murillo Racing Ret 19 31 24 19 24 Memo Gidley Motorsports USA 22 20 18 25 Anthony Geraci Nolasport 26 25 16 Dominic Starkweather 26 25 Ret DNS 26 Jason Harward Zelus Motorsports 19 15 26 Sean Whalen Zelus Motorsports 17 15 27 Christina Nielsen Murillo Racing Ret 19 12 28 Jeff Mosing Murillo Racing 31 24 7 29 Robert Orcutt The Racer's Group 31 28 4 Jason Alexandridis Motorsports USA 33 31 0 Nolasport Ret DNS Pos. Driver Team SON AUS VIR ELK WGL SEB IMS Points

Key Colour Result Gold Race winner Silver 2nd place Bronze 3rd place Green Points finish Blue Non-points finish Non-classified finish (NC) Purple Did not finish (Ret) Black Disqualified (DSQ) Excluded (EX) White Did not start (DNS) Race cancelled (C) Withdrew (WD) Blank Did Not Participate Bold – Pole Italics – Fastest Lap

†: Post-event penalty. Car moved to back of class.

Team's championships[]

Pos. Team Manufacturer SON AUS VIR ELK WGL SEB IMS Points Silver Cup 1 Murillo Racing Mercedes-AMG 3 2 Ret 2 1 Ret 5 11 136 2 CCR Racing / Team TFB BMW 8 15 15 18 7 6 6 27 106 3 ST Racing BMW 27 18 17 12 17 10 22 7 89 4 Dexter Racing Aston Martin 2 4 25 8 Ret DNS 18 26 82 5 Classic BMW BMW 11 4 5 2 36 Ret 80 6 Bimmerworld Racing BMW 18 31 7 Ret 11 7 14 NC 80 7 Marco Polo Motorsports KTM 9 6 19 9 14 22 67 8 PF Racing Ford 11 17 27 8 Conquest Racing West Mercedes-AMG 12 14 27 10 Rearden Racing Audi 9 22 24 Pro-Am Cup 1 Nolasport Porsche 1 1 1 1 2 3 7 15 155 2 Stephen Cameron Racing BMW 6 9 34 3 3 23 8 1 94 3 BSport Racing Aston Martin 4 8 18 6 9 1 13 3 94 4 Bimmerworld Racing BMW 7 12 4 Ret 16 5 1 4 75 5 The Racer's Group Porsche 19 5 10 14 6 4 4 20 70 6 WR Racing Aston Martin 10 3 12 7 4 12 Ret Ret 65 7 AutoTechnic Racing BMW 5 15 8 19 2 2 64 8 RENNtech Motorsports Mercedes-AMG 16 16 3 5 10 17 10 DNS 51 9 Black Swan Racing Porsche 11 7 2 21 Ret DNS 24 5 49 10 GMG Racing Aston Martin Audi 12 11 6 26 13 8 9 12 42 11 Heart of Racing Team Aston Martin 20 22 20 19 15 21 25 9 11 12 CarBahn with Peregrine Racing Audi 32 30 21 20 19 8 10 13 ST Racing BMW 24 25 35 10 8 14 Notlad Racing by RS1 Aston Martin 14 33 Ret 25 12 DNS 8 15 Rearden Racing Audi 23 10 24 29 6 16 Premier Racing Porsche 21 16 2 RHC Jorgensen / Strom BMW 30 32 28 28 0 Am Cup 1 TGR Smooge Racing Toyota 15 13 8 17 18 11 15 10 166 2 Nolasport Porsche 5 17 26 11 Ret 14 20 25 110 3 Capstone Motorsports Mercedes-AMG 13 14 14 Ret 20 9 30 19 110 4 Motorsport USA McLaren 17 20 22 13 27 6 87 5 Random Vandals Racing BMW 28 30 21 20 19 13 23 Ret 82 6 TGR Forbush Performance Toyota 32 29 30 27 23 18 28 24 64 7 The Racer's Group Porsche 31 28 33 Ret 24 15 32 28 48 8 Stephen Cameron Racing Porsche 16 13 33 9 Murillo Racing Porsche Ret 19 31 24 28 10 Automatic Racing Aston Martin 29 29 10 Pos. Team Manufacturer SON AUS VIR ELK WGL SEB IMS Points See also[] 2021 GT World Challenge America References[] ^ "A Return to the Roots of GT Sprint Racing in North America, SRO America Announces GT America for 2021". gt4-america.com. SRO Motorsports Group America. 3 October 2020. Retrieved 1 March 2021. ^ "SRO America Cancels CTMP Round for Second Straight Year". sportscar365.com. 2 March 2021. Retrieved 6 March 2021. ^ "Sebring Confirmed as CTMP Replacement". sportscar365.com. June 7, 2021. Retrieved June 7, 2021. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc Lloyd, Daniel (26 February 2021). "Winward, Turner Listed in Pro Class for Sonoma Opener". sportscar365.com. John Dagys Media. Retrieved 26 February 2021. ^ a b c d e f g h "The Return to Historic Watkins Glen International Brings 33-Car GT4 Field". gt4-america.com. SRO Motorsports Group. 10 September 2021. Retrieved 10 September 2021. ^ a b c d e "GMG Set For Another Banner Year in SRO with Multi-Car Program". gt4-america.com. SRO Motorsports Group America. 26 January 2021. Retrieved 26 January 2021. ^ a b c d e f g h i j k "2021 Entry List - Circuit of the Americas - GT4 America". gt4-america.com. SRO Motorsports Group America. Retrieved 26 May 2021. ^ a b c "Forbush Performance Launches with the First Toyota GR Supra GT4 in Pirelli GT4 America". gt4-america.com. SRO Motorsports Group America. 11 January 2021. Retrieved 11 January 2021. ^ a b c d e "ST Racing Set to Compete in the Full Pirelli GT4 America Championship in 2021". gt4-america.com. SRO Motorsports Group America. 5 February 2021. Retrieved 5 February 2021. ^ a b c "Rearden Racing Enters Four GT Machines for COTA Doubleheader With Burton/Kovarov, Novikov/Trinkler, McCoy/Westphal Lineups". gt4-america.com. SRO Motorsports Group America. 28 April 2021. Retrieved 26 May 2021. ^ a b c d e f g "BimmerWorld Racing: 2021 SRO GT4 America Season Announcement". gt4-america.com. SRO Motorsports Group America. 25 February 2021. Retrieved 25 February 2021. ^ a b c "RENNtech Returns to Pro Racing with Chouest/Povoledo and the Westport #89 RENNtech Mercedes-AMG GT4". gt4-america.com. SRO Motorsports Group America. 25 February 2021. Retrieved 25 February 2021. ^ a b "Chris Cagnazzi, Guy Cosmo join RENNtech Motorsports in Mercedes-AMG GT4". gt4-america.com. SRO Motorsports Group America. 26 April 2021. Retrieved 30 April 2021. ^ a b c "Three Women, No Limits: Straus, Nielsen, Legge to Run Pirelli GT4 America With Murillo Racing in Richard Mille Porsche". gt4-america.com. SRO Motorsports Group America. 24 February 2021. Retrieved 24 February 2021. ^ a b c "AutoTechnic Racing Enters Pirelli GT4 America Competition". gt4-america.com. SRO Motorsports Group America. 19 April 2021. Retrieved 22 April 2021. ^ a b c "SMOOGE Racing Set To Campaign Full Season with Toyota GR Supra GT4 in Pirelli GT4 America". gt4-america.com. SRO Motorsports Group America. 5 February 2021. Retrieved 5 February 2021. ^ a b c Lloyd, Daniel (30 April 2021). "Marco Polo Commits to Full Season With KTM X-Bow GT4 Evo". sportscar365.com. John Dagys Media. Retrieved 30 April 2021. ^ a b c "Random Vandals Racing Joins SRO Pirelli GT4 America". gt4-america.com. SRO Motorsports Group America. 16 February 2021. Retrieved 16 February 2021. ^ a b c d e "Final Pirelli GT4 America Champions to be Crowned in Indianapolis". gt4-america.com. SRO Motorsports Group America. 8 October 2021. Retrieved 12 October 2021. External links[] Official Website