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Vance & Hines 4" Monster Rounds Catalytic Slip-On Mufflers For Harley Touring 2007-2016

$719.99 $759.99
$899.99 $949.99
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Vance & Hines Monster Rounds Catalytic Slip On Mufflers For Harley Touring

Monster Round Catalytic slip-ons house two three-way catalytic converters and have been tested with Vance & Hines Power Duals or Dresser Duals to demonstrate that they meet emissions standards applicable in California. The real benefit of combining Vance & Hines Power Duals or Dresser Duals with the new Monster Round Catalytic slip-ons lies in the movement of the catalytic converter from the front half of the exhaust (as it is in the original equipment exhaust) to the back half of the exhaust, which yields a significant reduction in heat felt by the rider - this affects riders everywhere, not just in Cali! Monster Round Catalytic slip-ons make just as much power as standard Monster Round slip-ons, along with the same deep and mellow tone riders have come to love. And the finish is every bit as top-notch, sporting full coverage heat shields and machined billet end caps. In California, aftermarket part applications that have been identified specifically as replacement parts or have received an Air Resources Board Executive Order may be used on street and off-road motorcycles.


  • 4" monster round muffler bodies
  • CNC-machined end caps
  • Full-coverage heat shields
  • Available in chrome or black finish
  • Fits saddlebags with extended skirts
  • Sold as a pair
  • Made in the USA
Please review this product's fitment notes & exceptions prior to purchase: Add to Cart

This product is vehicle specific. Click here to select your bike to ensure fitment.

Fitment Notes & Exceptions
  • CARB Executive Order (E.O.) No. K-006-1
  • Requires use of Vance & Hines Power Duals or Dresser Duals headers to meet E.O. certification
  • E.O. covers all two-wheeled 103ci and 110ci models from 2007-Up
  • E.O. does not cover Tri-Glide models

This Product Fits:

Harley Davidson
Electra Glide Classic FLHTC/I 2007-2013
Electra Glide Standard FLHT/I 2007, 2008, 2009
Electra Glide Ultra Classic FLHTCU/I 2007-2016
Electra Glide Ultra Classic Low FLHTCUL 2015, 2016
Electra Glide Ultra Limited CVO/SE FLHTKSE 2015, 2016
Electra Glide Ultra Limited FLHTK 2010-2016
Electra Glide Ultra Limited Low FLHTKL 2015, 2016
Road Glide Custom FLTRX 2010, 2011, 2012, 2013
Road Glide FLTR/I 2007, 2008, 2009
Road Glide FLTRX 2015, 2016
Road Glide Special FLTRXS 2015, 2016
Road Glide Ultra CVO/SE FLTRUSE 2015, 2016
Road Glide Ultra FLTRU 2011, 2012, 2013, 2016
Road King Classic FLHRC/I 2007-2013
Road King Custom FLHRS/I 2007-2012
Road King FLHR/I 2007-2016
Street Glide CVO/SE FLHXSE 2015, 2016
Street Glide FLHX/I 2007-2016
Street Glide Special FLHXS 2014, 2015, 2016
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Product Style Item # Manufacturer Product # Availability
Black 937604 46857 In Stock: Ships within 24 hours
Chrome 937603 16857 In Stock: Ships within 24 hours