Race Master Race Flo Intake ValvesLS1 / LS2 / LS62.100'' Diameter8mm (0.3133'') Stem Diameter4.874'' Overall Length (Stock)Stainless Steel8/pkg. Type: Intake Valve NK-842 MaterialHead Diameter: 2.100''Stem Diameter: 8mm / 0.3133''Installed Height: StockOverall Length: 4.874''Tip Length: 0.175''Underhead Angle / Radius: Pro Flo 12° x 3/8''Margin: 0.050''Seat Width: 0.095''Top of Head: 7° DishWeight / Grams: 109