Oldsmobile V8 cylinder head bolts 1/2 77 and up
307,350,403 and 455 Oldsmobile engines
307 vin y 1980-90 vin 9 83-90
403 vin code k 1977-1979
full set of ARP hi performance head bolts
also used in some buick cars
buick 403 / 6.6 liter vin code k
century 1977
electra 77-79
estate wagon 77-79
lesabre 77-79
regal 77
riviera 77-78
some of the oem bolts may have studs on top caution these do not have them
gm made the spilt to 1/2 bolts in 1977 check size before ordering if you have 7/16 thread bolts use 180-3600
180-3601