This is a A-CL412 4-1/2" Muffler Clamps PN: CL412Main Description As Following : A-CL412 4-1/2" Muffler Clamps P.N: CL412 Dim A (1): FITS 4 1/2" DIAMETER PIPE Crossed From: CL-412 STANLEY MUFFLER , 3017-8023 , , 79023414 ALLIS-CHALMERS , 79023414V AGCO Found in Section & Models : Mufflers/Exhaust Pipes > Exhaust Pipes, (Miscellaneous) (UNDEFINED): SEVERAL, Case-IH TRACTOR: SEVERAL, Mufflers/Exhaust Pipes > Muffler Clamps, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also A-MNL18344 And : Dim A (1): FITS 4 1/2" DIAMETER PIPE