(Pack of 2) Stainless Steel Round Exhaust Muffler - 2.5" Inlet 4.5" Domed Tip (Black Coated) Improves Exhaust Velocity Performance. Offers Great Air Flow and Higher Horsepower Gain Instantly Increases 5 - 10 HPs for Most Vehicles Inner Inlet Diameter - 2.5" / Tip Diameter - 4.5" Overall Dimensions - 23.875"L x 6.5"W x 6.5"H Canister Dimensions - 14"L x 6.5"W x 6.5"H