User blog comment:JustToothpick/Best Multiplayer Cars for Each Brackets/@comment-28856025-20170517224028

Here are upgrade setups I created for older cars (all of these are below the new 1670 danger cutoff; only real speeds are shown):
 * Koenigsegg Agera R
 * 0505 5455 = S1667 = 288 mph/464 km/h
 * Peugeot Onyx
 * 1505 5155 = S1669 = 294 mph/474 km/h
 * Lamborghini Egoista
 * 0505 5052 = S1669 = 290 mph/468 km/h
 * Koenigsegg One:1
 * 0505 5052 = S1668 = 293 mph/472 km/h
 * McLaren F1 XP-5
 * 0502 4052 = S1669 = 287 mph/462 km/h
 * Ferrari Enzo Ferrari
 * 0004 0205 = S1520 = 253 mph/407 km/h
 * 0005 0202 = S1521 = 254 mph/408 km/h
 * 0405 5054 = S1668 = 294 mph/473 km/h
 * Mosler Super GT
 * 0501 5050 = S1669 = 291 mph/469 km/h
 * HTT Pléthore LC 750
 * 0500 5051 = S1669 = 303 mph/488 km/h
 * Renault Sport R.S. 01
 * 0500 4051 = S1668 = 299 mph/482 km/h
 * Savage Rivale GTR
 * 0401 0040 = A1521 = 255 mph/410 km/h
 * Ferrari 330 P4
 * 0503 5152 = A1669 = 288 mph/464 km/h
 * Mercedes-AMG C 63 Coupe Touring Car 2014
 * 1504 5555 = A1667 = 293 mph/472 km/h
 * Lamborghini Aventador LP 700-4
 * 1504 5152 = A1669 = 290 mph/467 km/h
 * Chevrolet Corvette C3
 * 0514 5455 = A1669 = 298 mph/480 km/h
 * Sbarro Alcador
 * 0505 5050 = A1669 = 291 mph/469 km/h
 * McLaren 675LT
 * 0504 5051 = A1669 = 292 mph/471 km/h
 * Mosler GT3
 * 0505 5050 = A1669 = 293 mph/471 km/h
 * Bentley EXP10 Speed 6
 * 0504 5053 = A1669 = 291 mph/469 km/h
 * Falcon F7
 * 4505 5555 = B1669 = 283 mph/456 km/h