Ferrea 6000 Series Exhaust Valve - 1.570" Head - 0.313" Stem Diameter - 4.915" Long - Small Block Chevy - (Set of 8) BR20003 this SB Chevy aluminum crank

this SB Chevy aluminum crank hub is NOT a harmonic damper

Springs precision wound to close tolerances

Advanced Aerodynamic Styling

494" OD guides

Ferrea 6000 Series Exhaust Valve - 1.570" Head - 0.313" Stem Diameter - 4.915" Long - Small Block Chevy - (Set of 8) BR20003 this SB Chevy aluminum crankProduct Description: Exhaust Valve 6000 Series 1. 570 in Head 0. 313 in Stem Diameter 4. 915 in Long Small Block Chevy Set of 8 Ferrea Racing Components are engineered to excellence! For decades, Ferrea Racing Components has been manufacturing hard core racing components for various types of engines in a wide range of categories worldwide. Ferrea uses the latest technological advances gained through the development of engine valve programs for Formula