Ferrea Competition Plus Valve Stainless Exhaust 1.600" Head 5/16" Valve Stem 5.060" Long - Small Block Chevy - Set of 8 GBDXXC it means that these are

it means that these are not suitable for open-top car racing or for karting

This filter features 5-layers of progressive

Using a sealed waterproof/dustproof motor that lasts up to 3 times longer than normal electric fan motors

20 mm Thread Pitch

1993-1995 GMC G2500

Ferrea Competition Plus Valve Stainless Exhaust 1.600" Head 5/16" Valve Stem 5.060" Long - Small Block Chevy - Set of 8 GBDXXC it means that these areProduct Description: Exhaust Valve Competition Plus 1. 600 in Head 5 16 in Valve Stem 5. 060 in Long Stainless 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