Vibrant1792ResonatorsVibrant Performance standard bottle style resonators are round bodied, densely packed with our premium multi-layered sound absorption materials, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance standard bottle style resonators have a sleek design that is optimal for easy installation and work to maximize the reduction of exhaust db levels. They are available in 12 & 18 overall lengths and inlet I.D. diameters ranging from 2.25 to 4.Featuring a true, straight-through perforated core that's surrounded with Vibrant's premium multi-layer sound suppression materials, these Bottle-Style resonators are designed to dampen exhaust noise without restricting exhaust flow. Vibrant Performance Bottle-Style resonators feature T304 stainless steel construction and come in a range of applications--one is sure to fit your ride just right!