AFR Dual Valve Spring - 450 lb. - 1.080 in Coil Bind - 1.270 in OD - AFR Cylinder Heads AA0810AF2X61 1991-1991 GMC R3500

1991-1991 GMC R3500

OE oil cooler port provision

2001-2006 GMC Sierra 1500 HD (Front) (Body: Crew Cab Pickup)

5 gal Water

0 VanJen Clamp - 3

AFR Dual Valve Spring - 450 lb. - 1.080 in Coil Bind - 1.270 in OD - AFR Cylinder Heads AA0810AF2X61 1991-1991 GMC R3500Product Description: Valve Spring Dual Spring 450 lb in Spring Rate 1. 080 in Coil Bind 1. 270 in OD AFR Cylinder Heads Replacement Set of 16 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