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Registered
Join Date: Jul 2003
Location: Perfidious Albion
Posts: 4,184
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H4 trim rings don't have adjustment holes - at least, mine don't.
My H5 rings did have adjustment holes (and didn't seem to take clip-on trim ring covers).
Or these could be the rings that're actually part of the H4 "bucket" itself I guess? Except that, on pairs of H4's I've had, those adjusting screws aren't at 9 and 12 o'clock, they're more like 2 and 8 o'clock.
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'77 S with '78 930 power and a few other things.
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