0.030in. Thick Cylinder Head & Base 0.014in. Gasket set. Fits Touring 2017up & Softail 2018up with OEM 114ci/117ci to 128ci & 4.250in. Big Bore Kit. - Cometic Gaskets Speedo 3-3/8" XL & FX & FXD'75-03 * Will not fit Road

* Will not fit Road King or Trike models

* Works with Stock springs and hydraulic lifters

* Heat Treated 4140 Material is harder & more than twice as strong as stock

* Patent-pending hidden breathers are o-ringed at the heads and exit out the mouth of the throttle body to provide efficient engine breathing

our Rebel 300 / 500 slip-on exhaust systems were developed to surpass what is offered on the market today

0.030in. Thick Cylinder Head & Base 0.014in. Gasket set. Fits Touring 2017up & Softail 2018up with OEM 114ci/117ci to 128ci & 4.250in. Big Bore Kit. - Cometic Gaskets Speedo 3-3/8" XL & FX & FXD'75-03 * Will not fit RoadFitment: * 2017up Milwaukee Eight * 4. 250 Bore * Typically used when upgrading OEM 114ci 117ci to 128ci * MLS 0. 030 thick Head Gaskets * Base Gaskets RC 0. 014 thick (OEM thickness) Tech Tips: * Use of these head gaskets without proper clearance checks can lead to catastrophic engine failure