If your Chevy or GMC truck just doesn't get the performance you expect from your original 6 cylinder engine maybe the vacuum advance is bad! The original vacuum advance has a rubber internal diaphragm that can dry rot and crack after 50 years of use. A defective vacuum advance will prevent the timing from advancing properly and will cause sluggish throttle response. This brand new vacuum advance from Eckler's Classic Chevy Trucks includes a new inner diaphragm good for another 50 years! Pep up your classic's performance with one of our new vacuum advances. This vacuum advance fits 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965 and 1966 Chevy and GMC trucks with 6 cylinder engines.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov