[HWYSTR455]

Yeah, heater core blocking doesn't provide much help, better off insulating the floorboard and firewall. By blocking some of the radiant heat from other sources (than the box) overall you will get a better improvement.

You could insulate the box too, but it really isn't going to help much, not enough to make any kind of noticeable difference anyway.

After driving a while, put your hand on the box, the floor, and the firewall, can see where most of the heat is coming from.

In my bird, I removed the tar paper one time when I did a carpet and driving to the beach one time the side of my sneaker melted to the tunnel. And that was just from removing the tar paper.

Dynaliner (or the like) is not expensive compared to the Dynamat.

You can wrap a section of the exhaust too, but not only is it a pain and cost, it can hold moisture and rot the pipe.


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