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Old 04-02-2017 | 11:41 AM
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sahartman21
 
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From: Fritch, TX
Default Engine for Pylon Training
The Evaluation 0.46 with the one piece muffler is approved for 424 racing. This uses a 9 x 6 APC propeller.

Some people add an extra head gasket for easier needling.

http://www.horizonhobby.com/evolutio...ffler-evoe0461
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