For GM Block 8 Cylinder engines.
Chris Craft, Crusader Marine, Mercruiser, OMC & Volvo 307, 327, 350 CU IN.
MC #'s 17437, 60658, 850399, 46-879194366, 46-879194401
Volvo #'s 885390, 856364, 211248846
OMC #'s 985429, 980477, 3853850
Pleasurecraft # RA057018
Sierra #'s 18-3583, 18-3599, 18-3506
Fits Late Model Vortec GM V-6 & V-8
Engines Using A Composite Timing Cover.
OE# 850399 1
Sierra# 18-3583