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Return to Parts List Category : D- Big Block (Low Deck) : Valves : 3/8" : Intake HUG 1017 INTAKE VALVE 3/8" STEM, 2.14" HEAD SG ONE PIECE, CHROME STEM, 21-4N STAINLESS STEEL. $12.75 One Piece, Chrome Stem, 21-4n Stainless Steel. Use in OEM iron heads with 3/8" guides     Head size: 2.14"     Length: 4.873" Stem diameter: 3/8" Type: F     All L.A. and Big Block Chrysler engines originally used 3/8" valve stem sizes. We recommend up-grading to 11/32" stem valves. Normally, when installing new valves, valve guides are needed. Install 11/32" guides and valves at that time. The cost will be similar and you will enjoy the benefits of lighter weight and less restriction to air flow.   For extra strength consider adding our Cryogenic treatment.  CLICK HERE