Tisco CRK264 Rod Bearing Kit STD. Case-IH TRACTOR: M (SN 278050>) Case-IH TRACTOR: MV (SN 278050>) Case-IH TRACTOR: OS6 (SN 35464>) Case-IH TRACTOR: O6 (SN 35464>) Case-IH TRACTOR: W6 (SN 35464>) Case-IH TRACTOR: W400 (C264 ENG SN 163808>) Case-IH TRACTOR: W450 (C281) Case-IH TRACTOR: 400 (C264 ENG SN 163808>) Case-IH TRACTOR: 450 (C281) Case-IH TRACTOR: SUPER M Case-IH TRACTOR: SUPER MTA Case-IH TRACTOR: SUPER W6 Case-IH TRACTOR: W400 (SN <163807) Case-IH TRACTOR: W6TA Case-IH TRACTOR: 400 (SN <163807).  Purchased at a tractor supply liquidation auction.  Thanks for looking.