Port & Starboard, Universal center riser manifold. Fits Chris-Craft 283, 305, 307 and 350 CID engines.
Crusader 283 and 327 CID engines (up to '64) and 305, 307 and 350 CID engines ('65 & Newer).
Mercury 190, 198, 225, 250, 270, 228, 898, 260, 255 and 280 models.
OMC 283, 305, 307 and 350 CID engines ('68-'80). Volvo 307 and 350 CID engines.
