These valves were used for a single race by a top NASCAR race team. They may require cleaning and other preparations before use. Here are the specs on these valves Type: Exhaust. Stem: 11/32".
Del West Titanium Exhaust Valves 1.60 7mm Valve stem 5.565 Long NASCAR
Del West Titanium Exhaust Valves 1.60 7mm Valve stem 5.565 Long .240TIP NASCAR
Del West Titanium Exhaust Valves 1.58 7mm Valve stem 5.680 Long .140TIP NASCAR
8 Del West 7MM Titanium Exhaust Valves 1.625" Head 5.820" Long NASCAR
NEW Nascar Del West Titanium 5/16 Valves Locks Keepers standard 7* retainers
1.630-7mm-R-5.640-D-150 TITANIUM EXHAUST VALVES XCELDYNE RACE DRAG 062617-29