SuperTrapp and Kerker "Stout" Slip-On Mufflers for FLH/FLT model Harley Davidson motorcycles
The new, larger (4") Chrome bodied units feature a billet aluminum end cap (pre-installed), newly shaped inlets that flow better into the OEM Head Pipe (as well as SuperTrapp True Dual Head Pipes).
There are two core variations representing the SuperTrapp (minimally louder than stock) and Kerker (Louder than th SuperTrapp version).
The SuperTrapp Stouts are available for both 10-12 models as well as 95-09 models.
The 10-12 units feature a newly designed tapered core that provides the absolute smoothest, broadest spread of HP(9.3) and TQ(10.5) right off idle and pulling well into upper RPM range. These new Stout Slip-Ons measure 95.6db (per J2825 standard stock is 93.2).
The Kerker units utilize a slightly more standard core that target's a slightly higher spread of power, more mid range RPM up through Redline (9.6HP and 8.9 TQ). They are also slightly louder than the SuperTrapp version, measuring 97db (per J2825 standard).