Grams Performance Add to Cart Grams Performance 12-13 Civic Si Plug and Play Adapter (for 550/750/1000cc Injectors) - G2-99-0060 MSRP: $10.49 Was: Now: $9.99 Grams adapters allow for a plug and play installation of the Grams 550, 750, 1000cc injectors for th…