Universal Exhaust Silencer 4" x 2.5" x 12" Long Back Box Resonator Muffler 304
4"x2.5"x6” 12" Long Universal Silencer Exhaust Resonator Stainless Steel 304 Back Box. -Middle section is straight-through and silencer, and the effect of reducing resonance is remarkable. Material: 304 Stainless Steel.