2.2S vs. 2.4S heads - any difference?
Just received a set of used S heads for my 2.7RS project. Expected 2.4S heads but I believe that what I received are 2.2S heads (assuming the way you tell is by date codes, 11-70, 1-71, 4-71). Any differences between the two that I need to be aware of? Thanks!
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Jim R.
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