Mercruiser, OMC 409-454 Big Block

For GM Block 8 Cylinder Big Block Engines
OMC 409 To 454 cu. in. engines.
Fits Early & Late Model Engines.
MC #’s 67859, 17670, 811573, 850454-1
Pleasurecraft # RA057019
OMC #’s 983443, 3854118, 3855991
Sierra # 18-3577
Volvo # 3855991
OE# 850454 1
Sierra# 18-3577