VALVE SPRING CUPS

Our O.D. spring cups are manufactured from 4140 steel case hardened to a minimum of .010" ensuring proper spring location and long life even under extreme spring pressure conditions in today's high performance engines.

CNC Machined Heat Treated Black Oxide Coated

PART #	SPRING O.D.	CUP O.D.	CUP I.D.	SHOULDER HEIGHT	THICKNESS
03-2000-16	1.250	1.390	.570	.150	.062
03-2001-16	1.437	1.550	.687	.150	.062
03-2002-16	1.550	1.680	.635	.150	.062
03-2003-16	1.550	1.680	.577	.150	.062
03-2004-16	1.625	1.740	.635	.150	.062
03-2005-16	1.660	1.740	.635	.140	.062
03-2006-16	1.550	1.740	.635	.158	.062
03-2007-16	1.560	1.740	.635	.128	.152
03-2008-16	1.650	1.740	.635	.183	.037

NEW! Nitro Black
High Performance Valves

Engine Pro's proprietary liquid nitriding process creates a high performance 21-4N valve that is smoother, stronger and more corrosive resistant than traditional chrome plated Stainless valves.

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