The 5x7 foam speaker baffles (they're like little foam enclosures that mount underneath/behind the speakers)are the fit. You have to make a little hole for the wires. They're about $8 per pair at Crutchfield (they have a picture). Road noise travels through any speaker medium (paper, poly - that's what it does) and is very noticable in the svt. Do the baffles. They're easy and cheap. You will be pleasantly surprised at the results.
