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Return to Parts List Category : A- Small Block "LA" : Valves HUG 1042 INTAKE VALVE 3/8" STEM 2.02" HEAD ONE PIECE, CHROME STEM, 21-4N STAINLESS STEEL. LENGTH: 5.030" $12.00 One Piece, Chrome Stem, 21-4n Stainless Steel.     Head size: 2.02" Length: 5.030" Stem diameter: 3/8" Type: A 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.