Jegs Coupon Codes JEGS High Performance is the second largest mail order company of automotive equipment in the United States. It sells performance auto parts, aftermarket accessories, tools, and race apparel. Around here, we do not just sell parts we rely on them when driving our own cars around racetracks, dirt trails, and interstates across the country. Parts may be our business but grease, fuel, exhaust, power, and speed are what we live for.