Introducing the S&S GNX 4

- Volt meter range: 8 to 18V

Kit includes weld-in bungs

Jaws: Style 2

Cobra 4" 909 Upper Cut Slip-On Mufflers for Harley Davidson

smp muffler gasket for harley Fits:2017 Dyna (HD OEM 65900017) Introducing the S&S GNX 4SMP Muffler Gasket for Harley Exhaust muffler gaskets are used to seal the connection between the muffler and exhaust header pipe. On newer European models replacement muffler gaskets may be required for fitting new slip on mufflers if current gaskets can not be reused. Note: These gaskets are only to be used on models that originally came with muffler gaskets. If your Harley does not have muffler gaskets currently, they will not be required for