Grams Performance 12-13 Civic Si Plug and Play Adapter (for 550/750/1000cc Injectors)

Grams Performance and Design specializes in advanced fuel injection and air intake solutions for American and European cars—designed in-house using computer simulation and modeling, then rigorously tested via dyno, street, and track to ensure supreme performance under the most demanding conditions. Built on years of motorsport involvement and OEM engineering experience, Grams Performance products combine cutting-edge materials, precision manufacturing, and real-world data to deliver high-quality, high-performance components trusted by street-car enthusiasts and racers alike.