You need injector connectors for 01+ cars. My friend just did his and he needed them. But he didnt know because no one told him/ knew about it. i even tried connecting my L67 injectors to my L36 wiring harness. Doesnt work. And im gonna have to check the parts store to see if i can find something like that. the gasket kit may seem more expensive because it also comes with a canned tune also. And dont you have to pay to unlock the PCM? And i dont know anyone who would like to tune my car for free.