4-cylinder Gas Injection System front-end kit for carburetted or pre-1999, mechanical or throttle-body petrol-injected engines. This is an alternative to the mixer-style induction systems. The standard kit comes with all components for the front-end, including poly pipe from the tank and Valtek type-30 injectors. An upgrade to high-performance Valtek type-34 injectors is an option. It does not include a lambda probe or a USB lead. You will need an AEB-type lead for connection to a PC in order to set up the system. If your engine does not have a lambda probe, we recommend fitting one. Engines with short inlet manifold branches may need injector straws to ensure that the gas goes to the correct cylinder. (Optional extra).