This is a A-3906412 Spring, Valve PN: 3906412Main Description As Following : A-3906412 Spring; Valve P.N: 3906412 A-3906412 Spring; Valve P.N: 3906412 Replaces: C3906412 MAXIFORCE Found in Section & Models : Engine Parts > 6-830T Turbo Charged Cummins "C" Series, Case-IH COMBINE: 1660 (Qty: 12), Case-IH COMBINE: 1666 (Engine SN 44706126>) (Qty: 12), Case-IH COMBINE: 1670 (Engine SN <44706125) (Qty: 12), Case-IH COMBINE: 1680 (Engine SN <44706125) (Qty: 12), Case-IH COMBINE: 2166 (SN