If you own a classic squarebody, then you know that often times the cowl air vents can become severely rusted over the years. More times than not the best choice is to replace them. BROTHERS Trucks has got exactly what you need with our replacement lower cowl air vents for the 1973-1987 C/K series trucks, including the 1973-1991 Blazer/Jimmy/Suburban. Manufactured for a precise fit from heavy gauge steel and EDP coated for strength and corrosion protection. They have the quality and fit that your project truck deserves.