There’s something for everyone! SuperTrapp & Kerker Stout 4″ Slip-Ons quench the thirst of riders longing for beautifully, crafted, 4″ chrome-bodied Slip-Ons with a pleasant tone and unsurpassed performance gains. 

They’re available for ’95 – 11 FLH / FLT models.  These non-tunable, Stouts close up 

massive 4″ Slip-Ons allow riders to make a bold statement with their newly developed core. The streamlined, internal tapered, billet aluminum end cap with recessed fasteners comes pre-installed. The newly shaped inlets flow better into the OEM head pipe as well as SuperTrapp True Dual Head Pipes. The oval cut outs are a sign of the true craftsmanship that went into the design of these pipes.

SUPERTRAPP STOUT 4″ SLIP-ONS: ST Stouts on Yaffe Custom

The SuperTrapp Stouts’ tapered core is minimally louder than stock for ’10 – ’11 FLH models. SuperTrapp Stout Slip-Ons provide a heavy, broad spread power curve right from idle w/ a 9.3 (16%) hp and 10.5 (14%) torque gain over stock (measured on a stock 2010 FLH). At 95.6 dB @ 2,000 rpm, or 2.4dB over stock, SuperTrapp Stouts are SAE-J2825 sound compliant.

SuperTrapp Stout 4″ Slip-Ons

FLH / FLT  ’10 – ’11  140-65224   MSRP $679.00

FLH / FLT ’95 – ’09   140-65222   MSRP $679.00 

KERKER STOUT 4″ SLIP-ONS:Kerker Stouts on Road King 

Kerker Stout 4″ Slip-Ons, like their name suggests, are not a wimpy pipe. They utilize a more traditional core which targets a higher spread of power providing more mid range RPM up through redline. Hand-crafted for your riding pleasure, they provide a bold, strong power curve from mid range on up with a 9.6 (17%) hp and 9 (12%) torque gain over stock (measured on a 2010 FLH). Louder than the SuperTrapp version, Kerker Stouts are 97dB (per SAE-J2825) or 5dB over stock with that classic Kerker, deep, heavy rumble. The predominantly displayed Kerker logo lets everyone know that your pipes perform! Kerker Stouts are bold and powerful.

Kerker Stout 4″ Slip-Ons

FLH / FLT  ’10 – ’11  140-78226   MSRP $649.00

FLH / FLT ’95 – ’09   140-78224   MSRP $679.00 

Contact your South Side Kustoms to place your order today. 1-800-675-3191 or  

These are hot and going fast!



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