[sengli]

If you plan on running the stock goodyear tires, which are so sticky they pick up every rock in the county and throw it against your car...you might need the expel. I learned on my C6 vette, that the rockers, and fenders near the tires take a terrible beating. I buy the material, and do the install on my own.

Or if you dont plan on keeping the car long term, then dont bother. At that point its just another used camaro to someone else.