Flowmaster's universal resonator helps avoid interior drone with an innovative product designed by Flowmaster's advanced R & D lab. Featuring a 2.50 inch offset inlet, 2.50 inch same side offset outlet, it delivers sound control on tough to quiet applications unlike anything else on the market. Flowmaster's universal resonator can be installed in front of or behind the muffler in new or existing installations and will work with other muffler types beyond Flowmaster. These amazing resonators feature full 409S stainless construction and are backed by our limited lifetime warranty. Best of all, they contain no packing materials so the tone achieved on initial start up, is the tone for life. These resonators have proven to be very effective when installed in the tailpipes behind the mufflers in dual muscle car applications, but can also be used in smaller displacement truck and SUV applications.