What the difference between 2A and 4A heads?
And are they interchangeable?
Will a 2A fit a 260, 307 and a 350 etc...?
Thanks
And are they interchangeable?
Will a 2A fit a 260, 307 and a 350 etc...?
Thanks
5A is a better head out of the two, port size and flow.So the 2A's are better than 5A's.......?
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