what ever i prolly spelled it wrong and catch hell for it... i have a cavalier and its get kinda loud when your going fast. so here is my question i want to kill the sound so its a nicer ride for me since im in my car a whole lot.. is there a product that you could spray under your car sorta like a liner but it has to be heat resistant.. because of exaust. im looking for something afford able.. but what ever... and if you have any ideas what i could use for the doors. let me know