Exhaust. 1.125 x 1.4420 x .2188". 45 Deg. Hi-Chrome Cast. Iron Cyl. head with 1.307" - 1.337" valve head diameter. (4 pack).
2.8L / 173 OHV V6 12V Chev. 89.00mm Bore 80-89
GM
4.3L / 260 OHV V8 16V "8,F" Olds. Gas 3.500" Bore 75-82
GM
GM173C-CH | 2.8L / 173 OHV V6 12V Chev. 89.00mm Bore 80-89
BUICK,
CHEVROLET,
OLDSMOBILE,
PONTIAC,
CADILLAC
GM260CA-OL | 4.3L / 260 OHV V8 16V "8,F" Olds. Gas 3.500" Bore 75-82
OLDSMOBILE,
BUICK,
PONTIAC