Jet Performance 90403 Plug In For Power Jet Performance Module Stage1 Features: Add Up To 25 Horsepower Plug-In Installation Dynamic Spectrum Tuning Of The Air/Fuel Ratio Stock Or Mildly Modified Vehicles Designed To Burn Fuel At Peak Efficiency Improved Performance And Mileage Use Of Mid-Grade Or Better Is Recommended 50 State Smog Legal Height: 6.25 Width: 2.25 Length: 4.00 Weight: 1.00 lbs