MerCruiser GM 333841 Crusader 59974 GM 454cid V8 7.4L Intake Manifold Lower Unit MerCruiser Part Number 425-3156 or

MerCruiser Part Number 425-3156 or 425-6516

Relevant part numbers 42673 (Stamped)

Chevy GM V6 4

You'll get a nice clean freshwater set just like these that are pictured

OMC Part No

MerCruiser GM 333841 Crusader 59974 GM 454cid V8 7.4L Intake Manifold Lower Unit MerCruiser Part Number 425-3156 orItem Details GM Intake Manifold P N 333841 Found on some MerCruiser, Crusader Inboards Sterndrives, and possibly OMC & Volvo Penta Should be MerCruiser 59974 or MerCruiser 815575 (if you remove the baffle) and possibly OMC 986073 0986073 I don't have an exact engine this came off of, but you should be able to just compare against your part number and also note whether or not you have the Deflector plate on the bottom as not all of them had these