Hooker Headers Aero Chamber Mufflers are designed to deliver a deep, throaty, powerful and aggressive tone all at once that will not fade over time. These Aero Chamber Mufflers are constructed from a 16 Gauge aluminized steel that is meant to last! Aero Chamber Mufflers flow 23% more over leading brands.Muffler Dimensions: 4.750"H x 10.250"W x 14"L Case. Overall Length 18.5" Unless noted otherwise