Super 10 Series Center In Center Out Exhaust Muffler SPELAB SPELAB Super 10 Series 409S stainless steel, single chamber mufflers. Intended for customers who desire the loudest and most aggressive sound they can find. Because these mufflers are so aggressive, they are recommended only for off-highway use and not for street-driven vehicles. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability. Features:Race-Proven Delta Flow TechnologyCompact Size For Easy Fitment409S Stainless Steel ConstructionSuper 10 Sound Level Specification: Muffler Material: 409 Stainless SteelDiameter (in.): 2.5" In 2.5" Out / 3.0" In 3.0" OutInlet Location: CenterOutlet Location: DualReversible: Yes Sound Guide: Super 10 Series>Super 44 Series>50 Series Package Contents: 1 x Exhaust Muffler