Jones Exhaust Flowpack Muffler JFP250 2.50 Inch Inlet / Outlet Jones Exhaust Flow pack MufflerJFP250 2.50 Inch Inlet / Outlet They are 5.00 round, with a 13.00 shell length and 19.50 overall. 16 Gauge Aluminized Steel Baffled Muffler produce a sound that is powerful and aggressive. Both durable and economical, Fits a 2.50 Inch Exhaust Pipe