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Thread: The New Werks B5 .21 Racing Engine
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Old 11-23-2009 | 05:13 AM
  #841  
daka
Tech Rookie
 
Joined: Nov 2009
Posts: 16
From: Sweden
Default Remove shim 25% nitro
I understand that the engine comes prepared for 30% nitro.

Do i need to remove a shim when using 25% nitro?
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