S&S, SuperStock intake valve, 1.900" diameter - 84-99 Evo B.T. with S&S SuperStock heads (NU) 500391 4" Straight Muffler Slip-ons With

4" Straight Muffler Slip-ons With Quick-change Series End CapsStraight 4" slip-on muffler with choice of billet aluminum quick-change end caps (sold separately)

High quality manufacturing with a PTFE inner core and a braided stainless steel protective cover in clear

Inner diameter steel bung: 29 mm

For use with most 1999-2019 Harley-Davidson models

Currently these are designed to fit CV carburetors (other options available soon)

S&S, SuperStock intake valve, 1.900" diameter - 84-99 Evo B.T. with S&S SuperStock heads (NU) 500391 4" Straight Muffler Slip-ons WithReplacement for S&S 512522 512523 531905 531906 Evo SuperStock performance heads.