12 x 6 Oval, 14" Length, 1.75" Bore, Wing 200398

12 x 6 Oval, 14" Length, 1.75" Bore, Wing. A wing configuration refers to a muffler that flows in via an offset, through the length of the muffler, through a mandrel bend at the far end acting as a U-Turn and then out the same end on the other offset, parallel to the inlet.