Ferrea 6000 Series Valve Stainless Exhaust 1.900" Head 11/32" Valve Stem 5.425" Long - Big Block Chevy - Set of 8 SR91152PUO-5 The linear spring rate offers

The linear spring rate offers plenty of support

and Oval & Sprint Car-racing teams

680 in Valve

2L Hellcat engine (this doesn't matter from a performance standpoint)

Ferrea 6000 Series Valve Stainless Exhaust 1.900" Head 11/32" Valve Stem 5.425" Long - Big Block Chevy - Set of 8 SR91152PUO-5 The linear spring rate offersProduct Description: Exhaust Valve 6000 Series 1. 900 in Head 11 32 in Valve Stem 5. 425 in Long Stainless Big 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