Can you provide the overall length of two of your Universal Internal Disc Series mufflers. The first muffler is 1.75 inch (44.5mm), part no. 358-1719 Tapered End Cap, which is listed as 15 inch. The second muffler is 1.75 inch (44.5mm), part no. 358-1721 Slash Cut End Cap 12 inch. The reason I ask is that information I researched elsewhere suggests that the body (without end cap) is 15 inch, which suggests the overall length is higher.

Could you also suggest a starting point for the quantity of discs I should install for a Kawasaki W650 with 2 into 1 exhaust. The W650 is 673 cc capacity and produces about 50 bhp.