Originally Posted by
nickwe21
I have seen a lot of cars run without it.
Also, if you have black smudges on your plastic engine cover I would almost suspect broken engine mounts that hit the hood-liner because the engine is rising up.
Just a thought. I guess it's there for noise cancelling but how much does that actually help?

Another thought, I always believed the hood liner was there to reduce the heat effect on the hood itself (like an insulation blanket). The less high temperatures hitting the underside, the longer the hood paint holds up.
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