Kerker Stout 4” slip-ons by SuperTrapp are a massive 4” non-disc that use a more traditional core than their SuperTrapp branded Stouts. The streamlined, tapered end cap with recessed fasteners comes pre-installed. Kerker Stouts "provide a bold, strong power curve from mid-range on up with a 9.6 (17%) hp and 9 (12%) torque gain over stock and at 5dB over stock, are louder than SuperTrapp Stouts." Compatible with chrome or black SuperTrapp True Duals or the SuperTrapp Crossover conversion adapter kit, they are available in chrome or black. Optional chrome or black end caps are available and sold separately as replacements or to mix and match for a customized look. They fit ’85 – ’15 Baggers and ’10 – ‘15 Tri-Glides and ’09 – ‘11 Street Glide Trikes.
Kerker, USA, www.supertrapp.com
