TUNER KITS For higher-horsepower, custom-tuned installations we recommend a tuner kit, which does not include a fuel pump, fuel injectors or ECU programmer. This requires you or your installer to provide custom calibration and the required fuel components. The V-3 JT-Trim supercharger included with the tuner kit is capable of up to 1,000 HP on modified vehicles. Tuner kits are also available as the Competition Tuner Kit, with the 1,200 HP capable V-7 JT-B supercharger for high-performance racing vehicles. Call Vortech or your dealer for more information. *NOTE: Competition Tuner Kits do not include 8-Rib serpentine crank damper pulley, which must be sourced separately.