Reduce unwanted interior resonance or drone with this polished 304 stainless steel resonator. This resonator is constructed out of 304 stainless steel and comes complete with high quality band clamps for an easy installation. Specifically designed for 2-1/2" exhaust systems, this resonator has a 4" Dia. x 12" Body, 16" overall length, and build for durability and rust resistance. This system will result in low turbulence, maximum flow, increased horsepower, and increased torque.