Stainless Steel Muffler Strap by Walker®. Material: Stainless Steel. Overall Length: 11.5″. Inlet Quantity: 1 Inlet. Outlet Quantity: 1 Outlet. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker accessories, you get ultimate quality products from the leader in the exhaust and emissions control industry.