S100 19200A Engine Brightener Aerosol - 4.5 oz. S100 Engine Brightener can take a tired, grayed-out engine and make it look almost factory-new again That factory black look comes back and lasts for miles and miles and holds up to a bunch of washes too Just clean the engine and dry, then spray-on S100 Engine Brightener Use the handy misting spray nozzle to get into the cooling fins and crannies without over-applying