AMCA Nationals 500 Holley Spacer Blocks

• The spacers are CNC machined from a heat resistant phenolic material which prevents heat transfer from the manifold into the carburettor.
• They are 38mm thick.
• They increase overall horsepower and throttle response due to the smooth transition they provide from the carb to the restrictor plate.
• They are a perfect match to the restrictor plate on the bottom, and the top suits a 500 holley.
• The holes to mount the carb are helicoiled and studs and nuts are included to mount the carb.
  

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