Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 Adjustable arms are slotted for

Adjustable arms are slotted for quick adjustment with included thumbscrew knobs to fit a variety of radiator heights

1/2 in NPT Dual Outlets

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

75 taller than our LS3 Super Victor intakes

5-2018 Chevrolet Silverado/Sierra 1500 (All Cabs) 14-18 Tahoe

Hastings 4.390" Bore Piston Rings 5/64 x 5/64 x 3/16" Thick Standard Tension Moly - 8 Cylinder 21411506 Adjustable arms are slotted forProduct 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.