Radiator Sleeves Twin Air Twin Air is proud to announce our latest product, the Twin Air Radiator Sleeve This new product is a nylon coated, glass yarn material that fits over the radiator louvers so no dirt, sand, or mud can stick to the radiator, clogging the radiator, causing overheating The Twin Air Radiator Sleeve is easily installed by removing the plastic radiator louvers and sliding the Twin Air Sleeve over the louvers and re-installing on the radiator