Originally Posted by landau37
Hi what is the difference between 4ma and 4mab, also i see there is a 4mab crank on ebay that started at $250. becouse its out of a gt phase 3 do the gt ones have a mark on them to say they are gt.
I personally think they are all the same, including the std cast one, with 351 cast into it. I think they will all handle the same power, but back to the question.
How i see it is there is the 4MA crank, and there is 4MB which is exactly the same thing that had a hardness test, maybe as quality control?
Could be all crap, but all 351 cranks are strong. Fact.
Use what ever you can get cheapest is good condition.