I/O  ELBOW MERCRUISER FITS 120 H.P. 153 CID

 I/O  ELBOW MERCRUISER FITS 140/165/V8 REAR RISER

 I/O  ELBOW MERCRUISER FITS 170/165/470/485--224 CID

 I/O  ELBOW MERCRUISER FITS 145 H.P. 181 CID (TURNED OUT)

 I/O  ELBOW MERCRUISER FITS V-6 OR V-8 W/CENTER RISER 3"

 I/O  ELBOW MERCRUISER FITS V-6/V-8 CENTER RISER 4"

 I/O  ELBOW MERCRUISER FITS REAR RISER W I/B REAR EXH