Keeps the intake manifold cooler. This hose is mainly used for really freakin cold climates to help warm it up quicker and keep condensation off of the throttle plate. In a way, it's kinda similar to the EGR in that the EGR can also help warm the engine up quicker.
BTW: Thanks Chris for the speedo cable and fuel door +1! I haven't put them on yet, but I may do it this weekend.
BTW: Thanks Chris for the speedo cable and fuel door +1! I haven't put them on yet, but I may do it this weekend.