As used in the 2018 Cobra Jet Race Engine Kit includes: (32) 38.3mm Titanium intake valves 36% lighter than stock (32) 32.5mm Titanium exhaust valves 29% lighter than stock (32) Lash caps (to reduce wear on valve stem tips) (32) modified 5.2L roller followers (for use with lash caps) (32) PAC TVS-2340 valve springs - 80lbs closed and 215lbs open 7 degree valve locks Spring retainers Valve stem seals Ford Performance designed and engineered to 9,000 rpm stability