the heatshield is so hard to put on. i had to back out studs to get mine to fitTheres a Hondata heatshield that goes between the intake manifold and the head. Its supposed to prevent heat from the head to transfer to the manifold somewhat. Im sure it would help a little if you do a lot of little things to cool the bay. Like wrapping header, Intake tube with that special cooling wrap stuff, heatshield, tilt hood, etc... and even after all that you wouldnt likely notice it. It might help built engines.