Pro-X 28.SIS1340-2 Steel Intake Valve and Spring Kit drive-drivetrain-gaskets 2011-2013 Harley Davidson FLSTFB Fat

2011-2013 Harley Davidson FLSTFB Fat Boy Lo

Chest: 59-61in

Crankshaft Bearing

all seams are electronically heat-welded

drag reduction - low temperature starts

Pro-X 28.SIS1340-2 Steel Intake Valve and Spring Kit drive-drivetrain-gaskets 2011-2013 Harley Davidson FLSTFB FatMaterial: Steel Replaces the OEM valves & valve springs. Steel, nitrided valves for increased durability and less wear under extreme conditions. Stronger valve springs deal with the extra weight of the steel valves. Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm. Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM