Borla Universal Pro-XS Muffler Oval 3in Inlet/ 2.5in Dual Outlet Transverse Flow Notched Muffler - 400499 fits_2015-`Audi`A3 it also combines with aerodynamic

it also combines with aerodynamic principles

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Borla Universal Pro-XS Muffler Oval 3in Inlet/ 2.5in Dual Outlet Transverse Flow Notched Muffler - 400499 fits_2015-`Audi`A3 it also combines with aerodynamicTransverse Flow design. Transverse flow mufflers were originally designed for GM F Body Camaros and Firebirds. On these vehicles they were mounted behind the rear axle and were parallel to the axle. This muffler can also be used to create custom systems on other vehicles. Single 3" Offset Inlet Dual 2. 5" Offset Outlets. The inlet and one outlet are on one end of the muffler, the second outlet is on the opposite end. Notched necks for clamp on