S&S Cycle Cylinder Kit - 910-0474 For Harley Motorcycles 2007-2017 Backrest low pressure exhaust vents aids

low pressure exhaust vents aids in air extraction

the relief valve is seated and sealed to a minimum of 30 psi with full pop-off at 55-60 psi

Test results show a decrease in engine sump oil levels

No annoying hose on your dipstick to worry about when checking your oil

Can be purchased with or without driver backrest which folds forward and has independent adjustments for position

S&S Cycle Cylinder Kit - 910-0474 For Harley Motorcycles 2007-2017 Backrest low pressure exhaust vents aidsNote: This kit will require that the case be bored to accept the larger cylinders Not recommended for trike models Features Big Bore kit yields excellent results with stock cylinder heads Easy installation no need to bore or split existing cases, just swap the cylinders (unless otherwise noted) Cylinders are constructed from premium aluminum castings with cast in iron liners Kit includes cylinders, pistons, rings and gaskets (head, base and exhaust)