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Return to Parts List Category : A- Small Block "LA" : Piston Rings 318 : 1/16-1/16-3/16 (Most Forged) : File Fit HUG CR3940 3.940" STD TNSN 1/16-1/16-3/16 PLASMA DUCTILE TOP RING, CAST SECOND RING AND 3 PIECE OIL RING $0.00 CONTACT US FOR PRICING AND AVAILABILITY   Be sure to check your ring sizes BEFORE ordering, as installed rings are NOT RETURNABLE!!! Classic Race set that features ductile iron plasma moly top rings, conventional 2nd rings & 3 piece standard tension oil rings. HELPFUL TIPS FOR RING FITTING AND SEATING All pistons (including new ones) should be checked for proper ring to groove clearances. Ring to piston groove back clearance should be a MINIMUM of .005" deeper than radial wall dimension of piston ring. If piston ring sticks out of groove by any amount, you have the wrong rings (see fig.1). Ring to groove side clearance should be a minimum of .0015 to a maximum of .003" (see fig.1).