Standings
GT Prototype Manufacturers Championship
| Pos | Teams | Points |
 US
|
US
|
US
|
US
|
US
|
US
|
 CA
|
US
|
US
|
US
|
US
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Porsche | 3257 | 382 | 328 | 350 | 380 | 355 | 380 | - | 380 | - | 350 | 352 |
| 2 | Cadillac | 3166 | 355 | 355 | 385 | 355 | 332 | 352 | - | 332 | - | 315 | 385 |
| 3 | Honda | 3056 | 328 | 382 | 308 | 328 | 380 | 335 | - | 355 | - | 332 | 308 |
| 4 | BMW | 2896 | 310 | 310 | 332 | 312 | 308 | 308 | - | 308 | - | 378 | 330 |
| 5 | Lamborghini | 1144 | - | 286 | - | - | - | 286 | - | - | - | 286 | 286 |
