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AR3910X Racing Spark Plug
 

AR3910X Racing Spark Plug

SKU: AR3910X
Price: $7.00
Quantity:
This is the spark plug you want for the clone or the Animal.  Gasoline or Methanol.  This plug greatly outperforms the stock plug that comes with a clone engine.  We have seen as much as a 3/4 HP gain simply by changing to this plug from the stock clone plug.

HINT...run the engine hot...at least 425°F
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