Dinan F9x X5M/X6M Foundation Package (F) F9X-X5MX6M-S63-F-B transmission-coolers 1 L6 1969 - 1972

1 L6 1969 - 1972 Chevrolet K20 Suburban 307/5 V8 1973 - 1974 GMC K35/K3500 Pickup 454/7

5 Outside Circumference (mm) (Belt): 774 Top Width (in) (Belt): 1

033 inch Warranty Limited 90 Day

They feature an etched NOS logo and tags for fuel and N20 identification during installation or jet changes

Dinan F9x X5M/X6M Foundation Package (F) F9X-X5MX6M-S63-F-B transmission-coolers 1 L6 1969 - 1972Dinan F9x X5M X6M Foundation Package (F) Foundation packages represent the most direct path to increased power while retaining drivability and safety. The combination of Dinan modifications work harmoniously with one another and offer a balanced blend of enhanced engine efficiency, improved acceleration and increased power to go along with a tasteful high performance look and unmistakable Dinan sound. Whether you start with the base Foundation package