12.9 grade head bolts B19 B21 & B23 B200 B230
Volvo 240, 360, 740 and 940 cylinder head bolts in 12.9 gradeFits all B19, B21, B23, B200 and B230 engines
Tightening spec
stage 1 - 43 ft.lbs
stage 2 - 80 ft.lbs