Compact size is perfect for applications with limited space. Reversible design for installation flexibility. The 401343 resonator is ideal for taking a loud system down a bit. It can be used alone in a single exhaust system or in pairs in a dual system. 100 welded construction for strength. It features a straight through performance design and is constructed of T - 304 stainless steel for high durability and includes notched inlet and outlet necks to allow for easy installation using 1 wide band clamps (clamps not included). It utilizes continuous - filament fiber (CFF) acoustic material for sound control. As with all Borla(r) mufflers and resonators, it is made in the USA and is covered by the Million - Mile Warranty.