See Figure 3-5. A combination intake manifold and cross over is used. It is a splider air plenum type which allows it to be completely separated from the coolant system. This permits removing the intake manifold without disturbing the coolant system.
The intake manifold is symmetrical, meaning it is proportionally the same, either from the front or the rear, so it is possible to install the intake manifold backwards. The engine would run, however the mounting boss for the secondary fuel filter would be in the wrong location for filter installation. The secondary fuel filter is at the rear of the intake manifold at the cowl.
This manifold is free standing and doesn’t see any oil splash or heat from the crankcase. Also it contains no coolant passages. This feature adds 5 to 10 lb. ft. of torque to the performance.
