Grand Rock - Peterbilt Exhaust Stack Mounting Clamps Grand Rock - Peterbilt Exhaust Stack Mounting Clamps Available sizes: 4", 5", 6", or 7 inch diameters 1.25 inch width Made of durable & beautiful polished Stainless Steel Sold Individually Made in America Grand Rock® Company is a major manufacturer and warehouse of superior exhaust systems for the aftermarket. Since 1970 Grand Rock has had its sights set on providing the customer with only the best parts and material in the industry. Through excellent customer service, rapid delivery, damage free packing and competitive pricing Grand Rock has grown to become the best in the industry. 21331, MB-5PBS, 21295, MB-7PBS Still looking for the perfect part? Having trouble finding it? Call our product experts at 603-224-7370 and let us lend a hand. EXTRAS Extras The following products are meant to be used or paired with the product above.Extras may also provide alternatives to the product you are seeking. DynaFlex Peterbilt Butt Joint Exhaust Angled Mounting Clamps DynaFlex Butt Joint Exhaust Mounting Clamps DynaFlex Peterbilt Butt Joint Exhaust Mounting Clamps Still looking for the perfect part? Having trouble finding it? Call our product experts at 603-224-7370 and let us lend a hand.