SuperTrapp and Kerker Stout 4-inch Slip-Ons are for Harley-Davidson FLH/FLT models.These non tunable mufflers have newly developed cores and an internal-tapered billet aluminum end cap with recessed fasteners and oval cut-outs.
SuperTrapp states that the newly shaped inlets flow better into the OEM head pipe as well as SuperTrapp True Dual Head Pipes. They provide a broad power curve right from idle, with power and torque gains of 9.6 hp (17 percent) and 10.5 ft.-lbs. (14 percent) measured on a stock 2010 FLH. At 95.6 dB at 2,000 rpm, or 2.4 dB over stock, the slip-ons are SAE-J2825-compliant.
Available in two part numbers for 1995-2009 or 2010-2011 model years. MSRP startsat $649.00. SuperTrapp Performance Exhausts
