| Business | Phone |
| Alliance Transmissions 10200 Hole Ave, Riverside 92503 | (951) 688-4646 |
| Bob Mazzolini Racing 3199 Columbia Ave, Riverside 92501 | (951) 787-8783 |
| J & M Speed Center 3230 Motor Cir, Riverside 92504 | (951) 688-7110 |
| 5150 Customs 12321 Sampson St, Riverside 92503 | (951) 520-8817 |
| Circle Track Performance 18730 Roberts Rd, Riverside 92508 | (951) 780-5117 |
| Full Scale Motor Sports 12390 Doherty St, Riverside 92503 | (951) 279-4100 |
| Hammer Racing Enterprises 6070 Stover Ave, Riverside 92505 | (951) 352-0496 |
| Lee Leighton Off Road Racing 3961 Alamo St, Riverside 92501 | (951) 682-3816 |
| Steve Tims Enterprises 9000 Arlington Ave # 111, Riverside 92503 | (951) 689-7475 |
| Tube-Works Off-Road Engnrng 9820 Indiana Ave # 34, Riverside 92503 | (951) 522-1117 |
| Wot Performance Products 12321 Sampson St, Riverside 92503 | (951) 734-6560 |
| Performance By Paul 6722 Columbus St, Riverside 92504 | (951) 359-3893 |
| Racer's Edge 9251 Orco Pkwy, Riverside 92509 | (951) 681-0640 |
| Zxtuner Riverside 92507 | (951) 784-9603 |