ZR4 3-3/4" Racing Engine w/the follwing components: ZR4 Billet Block (sleeved, bored and honed) ZR4 Billet head with o-ring stud kit ZR4 Billet head gasket ZR Billet side cover wiht hardware kit ZR4 Billet breather with hardware kit ARC 0.563 stroke Billet crankshaft with 1" journal Hardened crank gear with key Crank bearings Crank seals 4.375” Billet connecting rod Piston with rings, 0.590 wrist pin, and clips ZR4 Billet camshaft (0.509” lift) Cam bearings 5/16" diameter lifters Dual valve springs Titanium intake and exhaust valves Multi-angle valve job Valve seats Full length bronze valve guides CNC ported intake and exhaust ports 27” 3-stage coated header Large port billet intake with hardware kit 45mm Carb boot 45mm Mikuni carburetor Air filter 3° Billet adjustable coil bracket 3HP hot coil Billet 3HP flywheel Spark plug Grooved billet starter nut Billet fuel pump bracket Walbro fuel pump Billet oil plug Hardware Kit PROFESSIONALLY ASSEMBLED