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Old 05-08-2010 | 04:53 PM
  #131  
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thenova70ss
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Originally Posted by Billy888
Hi,
I have an older 'gold head' Axe Cobra 198R21. I ended up buying a turbo plug head button for it. It has the number 3 stamped on it. I use AT 25% Fuel, just wondering how much shimming is required? THX

Two .20 Shims should work for 25% i run Two .20 shims for 30% so it should work for 25% to.
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