APR Head Bolt Kit. Fits Twin Cam 1999-2017, Evo Big Twin 1985-1999 & Sportster 1992-2021 - Feuling Cylinders & Pistons * Complete lower line from

* Complete lower line from the caliper to under the triple tree

Chief Dark Horse & Chief Bobber Dark Horse

(FLH 2009-2013 use BMP-LE-01)

* Improved Engine Performance

* M8 thread

APR Head Bolt Kit. Fits Twin Cam 1999-2017, Evo Big Twin 1985-1999 & Sportster 1992-2021 - Feuling Cylinders & Pistons * Complete lower line fromPRODUCT DETAILS : * The strongest bolts available! * Top engine builders demand quality fasteners! Secure your engine with complete confidence * Superior in strength and performance to any other cylinder stud head bolt kit on the market, this kit is designed to exceed the needs of high performance engines. * Dont Risk Head Gasket Failure! * Precision j form threads for optimum engagement, to prevent galling and promote more consistent torque loading.