Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 1/2 in NPT Dual Outlets

1/2 in NPT Dual Outlets

For when days are short and the nights are cold

When using screw-in studs on a factory cylinder head it is necessary to machine down the stud boss equal to the thickness of the new stud's jam nut plus the guide plate thickness

who started the business by manufacturing by hand a small quantity of replacement fiber and aluminum timing gears for trucks and automobiles

Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 1/2 in NPT Dual OutletsProduct Description: Piston Rings 4. 390 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Steel Plasma Moly 8 Cylinder For nearly 100 years, Hastings has earned its reputation as a leader in piston ring technology.