Spec-D Tuning MF-RS310T N1 4" Burnt Tip Muffler Exhaust 2.5" Inlet Universal with Removable Silencer (B-Tip; 4 Inch) 4" Tip Light Weight Stainless Steel Exhaust Muffler 2.5" Inlet Straight Exit Design Muffler Greater Air Flow For Maximum Performance, Increase 5-10 Horsepower Greatly Enhance The Appearance Of Your Vehicle! 30 Day Money Back Guarantee & 90 Days Limited Warranty