SKU: 19220603657
Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
6L V8 1977 - 1982 Ford F-350 400/6
8/8 V 1963 Ford 300 3
7L V8 1984 - 1986 GMC K1500 Base 305/5
A handy parts guide is affixed to the inside case cover to assist in reordering components when necessary
Checker Marathon (1978
Apr Valve Spring Kit (1 Set)-MS100258 emission-systems 6L V8 1977 - 1982The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer
