Le Mans linear square oval silencer 2.50 inch inlet × 7 inches long, 3.0 inches ×  3.75 "outlet double wall T304 resonance stainless steel 2.50" inlet x7.0 "long, with 3.0" x3.75 "outlet, mainly to reduce the temperature and pressure of exhaust gas discharged from exhaust pipe, so as to eliminate sparks and reduce noise.