AFR Stainless Exhaust Valve - 1.760 in Head - 11/32 in Valve Stem - 5.050 in Long - Big Block Ford H768001S Opening Vacuum 4

Opening Vacuum 4

Carb recommendations: Edelbrock AVs2 or Performer Series 600-800 cfm

accurate readings

2003-2004 Chevrolet Silverado 1500 WT Extended Cab Pickup

AFR Stainless Exhaust Valve - 1.760 in Head - 11/32 in Valve Stem - 5.050 in Long - Big Block Ford H768001S Opening Vacuum 4Product Description: Exhaust Valve 1. 760 in Head 11 32 in Valve Stem 5. 050 in Long Stainless Big Block Ford For over thirty years Airflow Research has been defining technological leadership in cylinder head manufacturing and flow dynamics. This complete commitment to performance has enabled Airflow Research's cylinder heads to find themselves on the fastest race cars and the most powerful street machines in the country. As every engine builder will