Grade 8, 3/8-16 x 1 long, (16). Nickel plated. Each bolt is permanently attached with a set of special cam locking washers. When sufficiently torqued, the washers super hardened external serrated teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt loosening rotational movement is blocked by the cam locking action created by the washers interfacing matching cams. Loosening the bolt is literally an uphill climb. Vibration that would ordinarily loosen other header bolts actually increases the cam locking tension, keeping the bolt secure. Because this simple cam locking method uses tension instead of friction, contact with oil actually facilitates the cam effect. When changing headers these bolts can be loosened with a normal wrench, re-lubricated then reused.
1947 (47), 1948 (48), 1949 (49), 1950 (50), 1951 (51), 1952 (52), 1953 (53), 1954 (54), 1955 (55), 1956 (56), 1957 (57), 1958 (58), 1959 (59), 1960 (60), 1961 (61), 1962 (62), 1963 (63), 1964 (64), 1965 (65), 1966 (66), 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78), 1979 (79), 1980 (80), 1981 (81), 1982 (82), 1983 (83), 1984 (84), 1985 (85), 1986 (86), 1987 (87), 1988 (88), 1989 (89), 1990 (90), 1991 (91), 1992 (92), 1993 (93), 1994 (94), 1995 (95), 1996 (96), 1997 (97), 1998 (98)NPD Part Number : 9432-2LDN Manufacturer Reference #'s: 66825,
1965-1973 MUSTANG
1979-1995 MUSTANG
1967-1973 COUGAR
1948-1979 F1-F350
1980-1996 F100-F350
1997-2004 F150-F350
1966-1996 BRONCO
1967-1981 CAMARO
1964-1987 CHEVELLE
1967-1981 FIREBIRD
1962-1979 NOVA
1964-1972 TEMPEST GTO, TEMPEST, LEMANS
1947-1998 CHEVY TRUCK
1964-1988 CUTLASS
1964-1972 SKYLARK
1960-1976 MOPAR
1960-1970 FALCON (BEFORE 1/1/70)
1970-1970 FALCON (FROM 1/1/70)
1968-1971 TORINO
1964-1971 FAIRLANE
WARNING: This product can expose you to chemicals including lead and DEHP, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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