Twin Power 08-17 FXST FLST Voltage Regulator Black Replaces H-D 74540-08 40 Amp

Our high-quality replacement regulators keep you charging. They come with a one-year manufacturer's warranty.

• Direct fit electronic regulators offered in black or chrome finishes for many FL, FX, XL, Dyna, Softail, and Touring models
• Sized by amp rating 15-60 amps to match OEM stator and charging system requirements
• Help prevent overcharging and undercharging, extending battery and component life

Fits 2008 Harley Davidson FLSTC Heritage Softail Classic Base 2008 Harley Davidson FLSTF Fat Boy Base 2008 Harley Davidson FLSTSB Cross Bones Base 2008 Harley Davidson FXCW Rocker Base 2008 Harley Davidson FXCWC Rocker C Base 2008 Harley Davidson FXSTB Night Train Base 2008 Harley Davidson FXSTC Softail Custom Base 2009 Harley Davidson FLSTC Heritage Softail Classic Base 2009 Harley Davidson FLSTF Fat Boy Base 2009 Harley Davidson FLSTSB Cross Bones Base 2009 Harley Davidson FXCW Rocker Base 2009 Harley Davidson FXCWC Rocker C Base 2009 Harley Davidson FXSTB Night Train Base 2009 Harley Davidson FXSTC Softail Custom Base 2009 Harley Davidson FXSTSSE3 CVO Softail Springer Base 2010 Harley Davidson FLSTC Heritage Softail Classic Base 2010 Harley Davidson FLSTF Fat Boy Base 2010 Harley Davidson FLSTFB Fat Boy Lo Base 2010 Harley Davidson FLSTSB Cross Bones Base 2010 Harley Davidson FLSTSE CVO Softail Convertible Base 2010 Harley Davidson FXCWC Rocker C Base 2010 Harley Davidson FXSTC Softail Custom Base 2011 Harley Davidson FLSTC Heritage Softail Classic Base 2011 Harley Davidson FLSTF Fat Boy Base 2011 Harley Davidson FLSTFB Fat Boy Lo Base 2011 Harley Davidson FLSTSB Cross Bones Base 2011 Harley Davidson FXCWC Rocker C Base 2011 Harley Davidson FXS Blackline Base 2012 Harley Davidson FLS Softail Slim Base 2012 Harley Davidson FLSTC Heritage Softail Classic Base 2012 Harley Davidson FLSTF Fat Boy Base 2012 Harley Davidson FLSTFB Fat Boy Lo Base 2012 Harley Davidson FXS Blackline Base 2013 Harley Davidson FLS Softail Slim Base 2013 Harley Davidson FLSTC Heritage Softail Classic Base 2013 Harley Davidson FLSTF Fat Boy Base 2013 Harley Davidson FLSTFB Fat Boy Lo Base 2013 Harley Davidson FXS Blackline Base 2013 Harley Davidson FXSB Breakout Base 2013 Harley Davidson FXSBSE CVO Breakout Base 2014 Harley Davidson FLS Softail Slim Base 2014 Harley Davidson FLSTC Heritage Softail Classic Base 2014 Harley Davidson FLSTF Fat Boy Base 2014 Harley Davidson FLSTFB Fat Boy Lo Base 2014 Harley Davidson FLSTNSE CVO Softail Deluxe Base 2014 Harley Davidson FXSB Breakout Base 2014 Harley Davidson FXSBSE CVO Breakout Base 2015 Harley Davidson FLS Softail Slim Base 2015 Harley Davidson FLSTC Heritage Softail Classic Base 2015 Harley Davidson FLSTF Fat Boy Base 2015 Harley Davidson FLSTFB Fat Boy Lo Base 2015 Harley Davidson FLSTNSE CVO Softail Deluxe Base 2015 Harley Davidson FXSB Breakout Base 2016 Harley Davidson FLS Softail Slim Base 2016 Harley Davidson FLSS Softail Slim S Base 2016 Harley Davidson FLSTC Heritage Softail Classic Base 2016 Harley Davidson FLSTF Fat Boy Base 2016 Harley Davidson FLSTFB Fat Boy Lo Base 2016 Harley Davidson FLSTFBS Fat Boy S Base 2016 Harley Davidson FXSB Breakout Base 2016 Harley Davidson FXSE CVO Pro Street Breakout Base 2017 Harley Davidson FLS Softail Slim Base 2017 Harley Davidson FLSS Softail Slim S Base 2017 Harley Davidson FLSTC Heritage Softail Classic Base 2017 Harley Davidson FLSTF Fat Boy Base 2017 Harley Davidson FLSTFB Fat Boy Lo Base 2017 Harley Davidson FLSTFBS Fat Boy S Base 2017 Harley Davidson FXSB Breakout Base 2017 Harley Davidson FXSE CVO Pro Street Breakout Base