This fuel injected small-block has the same specifications as the RPM E-Tec 435 but is equipped with our powerful and efficient Pro-Flo 2 electronic fuel injection. The Pro-Flo 2 EFI system is complete with intake manifold, fuel injectors, fuel rails and throttle body. The electronic engine control unit (ecu) is flash programmable and can be fine tuned right from the driver's seat with the included handheld calibration module. This engine offers all the modern performance of fuel injection with the classic style of a fourblade throttle body that accepts a round top-mounted air-cleaner. Your choice of satin aluminum or polished finishes. Optional water pump styles are also available.