These kits are basically comprehensive throttle body kits without the engine management supplied. They are particularly suitable for those who already have their own management or wish to use an alternative system. The kits are supplied fully built and are ready for bolting on the engine. Fully compatible with all major aftermarket engine management systems. Assembly includes inlet manifold, 45mm Alpha throttle bodies, throttle linkage, air rails, air temperature sensor, Alpha throttle position sensor, Alpha foam air filter and back plate, Pico fuel injectors, fuel hose and breather system.