| Title | Products |
|---|
| Intake Manifolds and Components | 334 |
| Intake Spacers | 6 |
| Intake Valley Covers | 12 |
| Integra Shocks | 7 |
| Intellitronix | 4 |
| Intercomp | 39 |
| Intercooler Ducting | 25 |
| Intercooler Kits | 174 |
| Intercooler Pipe Kits | 185 |
| Intercooler Sprayers | 1 |
| Intercoolers | 369 |
| Intercoolers and Heat Exchangers | 49 |
| Interior Accessories | 612 |
| Interior and Accessories | 947 |
| Interior Light Assemblies | 4 |
| Interior Lighting | 6 |
| Interior Lights and Components | 4 |
| Interior Trim | 8 |
| Internal Support Coils | 1 |
| Invidia | 216 |
| ION Wheels | 52 |
| ISC Suspension | 42 |
| Isky Cams | 136 |
| ISR Performance | 130 |
| J&L | 156 |
| J-w Performance | 31 |
| Jack Dirt Wings and Pads | 1 |
| Jack Stands | 9 |
| Jackets - Leather | 0 |
| Jackets - Textile | 2 |
| Jacks | 16 |
| Jacobs Ladder Fasteners | 0 |
| Jam Nut | 0 |
| Jaz | 113 |
| JBA | 79 |
| Jba Performance Exhaust | 32 |
| JE Pistons | 378 |
| Jerico | 9 |
| Jerseys | 0 |
| Jesel | 64 |
| Jet Performance | 35 |
| Jiffy-tite | 1 |
| JKS Manufacturing | 87 |
| JMS | 15 |
| Joes Racing Products | 146 |
| Joes Racing Products | 0 |
| Jones Racing Products | 44 |
| Jp Performance | 31 |
| K&N Engineering | 81 |
| K-Members and Components | 17 |
| K.s.e. Racing | 18 |
| K1 Racegear | 186 |
| K1 Technologies | 17 |
| Kansei | 21 |
| Kartboy | 31 |
| Kb Performance Pistons | 84 |
| KC HiLiTES | 179 |
| Keep It Clean | 3 |
| Keizer Aluminum Wheels, Inc. | 50 |
| Kentrol | 57 |
| Kevko Oil Pans & Components | 31 |
| Key Chains | 0 |
| Keychains | 0 |
| Keyless Ignition Systems | 1 |
| Kickstands | 0 |
| Killer B Motorsport | 14 |
| King Bearings | 109 |
| King Engine Bearings | 349 |
| King Pin Stud | 1 |
| King Pins and Components | 4 |
| King Racing Products | 43 |
| King Shocks | 166 |
| Kinser Air Filters | 4 |
| Kinsler | 14 |
| Kirkey | 99 |
| Kleinn Air Horns | 77 |
| Klotz Synthetic Lubricants | 50 |
| Kluhsman Racing Products | 7 |
| Knee and Elbow Pads | 1 |
| Knee Pads | 0 |
| KONI | 511 |
| Koni Shocks | 70 |
| Konig | 177 |
| Kooks Headers | 218 |
| Kool Mat | 2 |
| Koyo | 116 |
| KraftWerks | 27 |
| Krc Power Steering | 39 |
| KW | 207 |
| KYB | 194 |
| Kyb Shocks | 36 |
| Ladder Bar Crossmembers | 5 |
| Ladder Bar Mounts and Brackets | 0 |
| Ladder Bars | 8 |
| Ladder Racks | 6 |
| Lakewood | 26 |
| Landrum Springs | 21 |
| Lash Caps | 1 |
| Launch Controllers | 6 |
| Launch Devices | 0 |
