| No. | Class | Team | Drivers | Car | Engine | Tyres | Fuel | |
|---|---|---|---|---|---|---|---|---|
| 1 | 0 | P | DeltaWing Racing Cars | Andy Meyrick Katherine Legge | DeltaWing DWC13 | Elan | C | IMSA E10 |
| 2 | 1 | P | Extreme Speed Motorsports | Scott Sharp Ryan Dalziel | HPD ARX-03b | Honda | C | IMSA E10 |
| 3 | 2 | P | Extreme Speed Motorsports | Ed Brown Johannes van Overbeek | HPD ARX-03b | Honda | C | IMSA E10 |
| 4 | 5 | P | Action Express Racing | João Barbosa Christian Fittipaldi | Corvette DP | Chevrolet | C | IMSA E10 |
| 5 | 10 | P | Wayne Taylor Racing | Ricky Taylor Jordan Taylor | Corvette DP | Chevrolet | C | IMSA E10 |
| 6 | 31 | P | Marsh Racing | Eric Curran Boris Said | Corvette DP | Chevrolet | C | IMSA E10 |
| 7 | 42 | P | OAK Racing | Gustavo Yacaman Alex Brundle | Morgan | Nissan | C | IMSA E10 |
| 8 | 60 | P | Michael Shank Racing | John Pew Ozz Negri Jr | Riley DP | Ford EcoBoost | C | IMSA E10 |
| 9 | 70 | P | SpeedSource | Sylvain Tremblay Tom Long | Mazda (Lola) | Mazda | C | IMSA Diesel |
| 10 | 90 | P | Spirit of Daytona | Richard Westbrook Michael Valiante | Corvette DP | Chevrolet | C | IMSA E10 |
| 11 | 01 | P | Chip Ganassi Racing | Scott Pruett Memo Rojas | Riley DP | Ford EcoBoost | C | IMSA E10 |
| 12 | 07 | P | SpeedSource | Tristan Nunez Joel Miller | Mazda (Lola) | Mazda | C | IMSA Diesel |
| 13 | 7 | PC | Starworks Motorsport | Martin Fuentes Sam Bird | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 14 | 8 | PC | Starworks Motorsport | Mirco Schultis Renger van der Zande | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 15 | 25 | PC | 8Star Motorsports | Luiz Diaz Sean Rayhall | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 16 | 38 | PC | Performance Tech Motorsports | Charlie Shears David Ostella | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 17 | 52 | PC | PR1/Mathiasen Motorsports | Frankie Montecalvo Gunnar Jeannette | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 18 | 54 | PC | CORE autosport | Jon Bennett Colin Braun | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 19 | 85 | PC | JDC/Miller Motorsports | Chris Miller Stephen Simpson | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 20 | 88 | PC | BAR1 Motorsports | Doug Bielefeld Ryan Eversley | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 21 | 08 | PC | RSR Racing | Chris Cumming Alex Tagliani | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 22 | 09 | PC | RSR Racing | Duncan Ende Bruno Junqueira | ORECA FLM09 | Chevrolet | C | IMSA E10 |
| 23 | 3 | GTLM | Corvette Racing | Jan Magnussen Antonio Garcia | Chevrolet Corvette C7.R | Chevrolet | M | IMSA E85C |
| 24 | 4 | GTLM | Corvette Racing | Oliver Gavin Tommy Milner | Chevrolet Corvette C7.R | Chevrolet | M | IMSA E85C |
| 25 | 17 | GTLM | Team Falken Tire | Wolf Henzler Bryan Sellers | Porsche 911 RSR | Porsche | F | IMSA E85C |
| 26 | 55 | GTLM | BMW Team RLL | Bill Auberlen Andy Priaulx | BMW Z4 GTE | BMW | M | IMSA E85C |
| 27 | 56 | GTLM | BMW Team RLL | Dirk Müller John Edwards | BMW Z4 GTE | BMW | M | IMSA E85C |
| 28 | 57 | GTLM | Krohn Racing | Tracy Krohn Nic Jonsson | Ferrari F458 Italia | Ferrari | M | IMSA E85C |
| 29 | 62 | GTLM | Risi Competizione | Giancarlo Fisichella Pierre Kaffer | Ferrari F458 Italia | Ferrari | M | IMSA E85C |
| 30 | 91 | GTLM | SRT Motorsports | Dominik Farnbacher Marc Goossens | SRT Viper GTS-R | Viper V10 | M | IMSA E85C |
| 31 | 93 | GTLM | SRT Motorsports | Jonathan Bomarito Kuno Wittmer | SRT Viper GTS-R | Viper V10 | M | IMSA E85C |
| 32 | 911 | GTLM | Porsche North America | Nick Tandy Richard Lietz | Porsche 911 RSR | Porsche | M | IMSA E85C |
| 33 | 912 | GTLM | Porsche North America | Pat Long Michael Christensen | Porsche 911 RSR | Porsche | M | IMSA E85C |
| 34 | 18 | GTD | Mühlner Motorsports America | TBA TBA | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 35 | 19 | GTD | Mühlner Motorsports America | Mark Kvamme TBA | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 36 | 22 | GTD | Alex Job Racing | Cooper MacNeill Leh Keen | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 37 | 23 | GTD | Team Seattle/Alex Job Racing | Ian James Mario Farnbacher | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 38 | 27 | GTD | Dempsey Racing | Patrick Dempsey Andrew Davis | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 39 | 30 | GTD | NGT Motorsport | Henrique Cisneros Kuba Giermaziak | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 40 | 33 | GTD | Riley Motorsports | Jeroen Bleekemolen Ben Keating | SRT Viper GT3-R | Viper V10 | C | IMSA E10 |
| 41 | 35 | GTD | Flying Lizard Motorsports | Seth Neiman Dion von Moltke | Audi R8 LMS | Audi | C | IMSA E10 |
| 42 | 44 | GTD | Magnus Racing | John Potter Andy Lally | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 43 | 45 | GTD | Flying Lizard Motorsports | Nelson Canache Jr Spencer Pumpelly | Audi R8 LMS | Audi | C | IMSA E10 |
| 44 | 46 | GTD | Fall-Line Motorsports | Charles Espenlaub Charlie Putman | Audi R8 LMS | Audi | C | IMSA E10 |
| 45 | 48 | GTD | Paul Miller Racing | Christopher Haase Bryce Miller | Audi R8 LMS | Audi | C | IMSA E10 |
| 46 | 51 | GTD | Spirit of Race | Jack Gerber Eddie Cheever III | Ferrari 458 Italia | Ferrari | C | IMSA E10 |
| 47 | 58 | GTD | Snow Racing | Madison Snow Jan Heylen | Porsche 911 GT America | Porsche | C | |
| 48 | 63 | GTD | Scuderia Corsa | Alessandro Balzan Jeff Westphal | Ferrari 458 Italia | Ferrari | C | IMSA E10 |
| 49 | 64 | GTD | Scuderia Corsa | Stefan Johansson Kyle Marcelli | Ferrari 458 Italia | Ferrari | C | |
| 50 | 71 | GTD | Park Place Motorsports | Jim Norman Craig Stanton | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 51 | 73 | GTD | Park Place Motorsports | Patrick Lindsey Kevin Estre | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 52 | 81 | GTD | GB Autosport | Bob Faieta Damien Faulkner | Porsche 911 GT America | Porsche | C | IMSA E10 |
| 53 | 94 | GTD | Turner Motorsport | Dane Cameron Markus Palttala | BMW Z4 | BMW | C | IMSA E10 |
| 54 | 007 | GTD | TRG-AMR | Al Carter James Davison | Aston Martin V12 Vantage | Aston Martin | C | IMSA E10 |
| 55 | 009 | GTD | TRG-AMR | TBA TBA | Aston Martin V12 Vantage | Aston Martin | C | IMSA E10 |
| 56 | 555 | GTD | AIM Autosport | Bill Sweedler Townsend Bell | Ferrari 458 Italia | Ferrari | C | IMSA E10 |
