My Volant plastic air intake tube and open element, I placed my MAT sensor in it just before the TB and at idle I only measure less than 5* above ambient and under cruise or acceleration it is within 1* of ambient. Insulating the intake tube is not where the 'money/payoff' is. The heat soaked intake manifold sitting above the exhaust is the problem. I am going to go and shoot the IR temp gun at the intake manifold. If MATs are 130-155*, just imagine hot hot the intake manifold itself must be! Like the movie(?which one,old robot movie with kids and found robot had cool tracks for feet), 'More Data'. Found it- Short Circuit (1986) – Johnny 5.