Term3· Premium Member
The only thing you should be insulating is the exhaust side of the engine, preferably ceramic coated as it holds in the heat best. Insulating on the intake side, and that includes the intercooler piping, should not be insulated. That's why aluminum is used, it dissipates heat faster then steel. The warmer the air going into the engine the less dense it is a thus the less horsepower it will make.