Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 For when days are short

For when days are short and the nights are cold

NOTE: Image is for reference only and shows model TF193

1979-1991 GMC K3500

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

Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 For when days are shortProduct 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.