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SPO.jpgSPO Touring Mufflers redefine what throaty big-block rumble means for a dresser. Mellow when you want them to be, but a deep growl when you get on the throttle. The perfect choice for long-distance riders, and for those who ride two-up. You can hear your radio and still get the enhanced midrange torque your bagger needs.

These mufflers have been re-styled and include a new sculpted alloy, high-temp coated black Xylan® end cap option with a machined-in S&S logo. All SPO mufflers are double-wall constructed to virtually eliminate bluing. Choose from show quality chrome or Jet-Hot® black ceramic coating finishes for the mufflers. Jet-Hot guarantees for life the black coating not to discolor, blister or peel.

Pick your SPO muffler finish, pick your end cap style, and rumble on down the highway.


  • Harley-Davidson® touring models with non-catalyst mufflers (except 2010 Road Glide® Custom and Street Glide® and all Tri Glide® models)


  • One of a kind styling and sound
  • Big block rumble, but not too loud when cruising down the road
  • Significant torque gains in the mid-rang  just where you need it
  • Double-walled muffler construction with insulation that virtually prevents bluing
  • Mufflers offered in show quality chrome or Jet-Hot black ceramic finishes
  • Made in the U.S.A.


  • Chrome finish with black Xylan® or chrome alloy end cap
  • Black Jet-Hot ceramic finish with chrome alloy end cap
  • Change end caps to change your look



End Cap Style Part Number  
Chrome with black Xylan® coated end caps
Chrome with chrome end caps 550-0001 ORDER ONLINE
Black with chrome end caps 550-0146 ORDER ONLINE
*(except 2010 Road Glide & Street Glide and all Tri Glide models)
Watch the SPO / PowerTune Video


This readout from our DynoJet® 250i chassis dynamometer shows why the S&S® SPO® mufflers are so well suited for touring motorcycles. The wide smooth torque curve is just the ticket for accelerating a heavy bike or pulling a trailer, and theres enough top end horsepower to keep up with traffic anywhere.


For a Complete S&S® Exhaust System, check out our Power Tune Duals Here

For a S&S® Black Exhaust Systems, click Here

Special notes:

It may be necessary to re-jet the carburetor or recalibrate the fuel injection system for best performance when a change is made in the exhaust system.

Dyno results are from tests performed at the S&S® Research and Development facility in Viola, Wisconsin.

Emissions Notice: S&S Cycle, Inc. exhaust systems and slip-on mufflers are legal for sale and use on U.S. EPA and California pollution controlled motorcycles not originally equipped with a catalyst in the exhaust system. In addition S&S slip-on mufflers are legal for sale and use on U.S. EPA and California pollution controlled motorcycles that have the catalyst located in the header pipes upstream of the muffler. Removing a catalytic converter from a pollution-controlled motorcycle is considered tampering and can lead to substantial fines and penalties. Unless otherwise noted additional S&S components shown are restricted to closed course competition use only.

Exhaust Noise Disclaimer: Unless noted, S&S exhaust components do not meet U.S. EPA noise standards and may be restricted to closed course competition use. Check local noise ordinances before use.