21 Pro Competition Off Road Engine

2 Needle Carb.

Not only with .21 off road engine high performance,
but also included the new head design for the engraving,
milling cutting and patented thermal sensor.

Using SH air filter and R4 plug which with high quality,
precision manufacturing, long-life and maxi power features.

Patented thermal sensor:
to measure the plug temperature through ehe head by the thermal sensor.

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