F.A.S.T. Spark Advance Lockout - Mechanical/Vacuum - Aluminum - GM HEI Distributors 11004 Will fit Corvette and 1987

Will fit Corvette and 1987 and later stock aluminum heads

1962-1968 AC Shelby Cobra

Spring Locator O

600 in Knurl

F.A.S.T. Spark Advance Lockout - Mechanical/Vacuum - Aluminum - GM HEI Distributors 11004 Will fit Corvette and 1987Product Description: Spark Advance Lockout Mechanical Vacuum Aluminum GM HEI Distributors Sold Individually FAST is the leading developer of electronic fuel injection systems, EFI components, intake manifolds, tuning tools for high performance and street applications. For over 10 years, FAST has been recognized as the leading developer of advanced electronic fuel injection technology. Our engineers have ignited new sparks never before seen in the EFI