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Pumpheads

597 views 3 replies 2 participants last post by  Big Baller 82cutlass  
#1 ·
Does any one know how to identify the difference between Marzochi pumpheads? I was told I have a #11 & a #7.
Are they identified by even or odd?
I also have a Rockford in my hands and was wondering how you can tell on those as well?