Ad says "Product measures 23" x 8" x 7". These are BOX sizes! The body of a real muffler without fittings is only 14 inches. I was a little disappointed when I realized my old muffler body was a full 20" long so I figured that would be pretty close. Boy was I wrong. I think I should have bought 17911 which shows it's 26 in length .I'm sure the silencer itself is great as I've heard Walker is a good name but the advertising is misleading.