AFR Inconel Exhaust Valve - 1.880 in Head - 11/32 in Valve Stem - 5.450 in Long - Big Block Chevy 12815P Vacuum Ports: 1 timed (spark)

Vacuum Ports: 1 timed (spark) port

3-piece modular bracket has the caliper bracket bolted separately for easy installation to a 3" axle tube without removing the rear hub assembly

2004-2005 Chevrolet Silverado 1500

1959-1979 Pontiac Parisienne

AFR Inconel Exhaust Valve - 1.880 in Head - 11/32 in Valve Stem - 5.450 in Long - Big Block Chevy 12815P Vacuum Ports: 1 timed (spark)Product Description: Exhaust Valve 1. 880 in Head 11 32 in Valve Stem 5. 450 in Long Inconel Big Block Chevy 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