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Cylinder heads dictate power   potential from any engine, and it should come as no surprise that the Rat motor has this area covered with monstrous ports that can   flow more air than   a sewer pipe. Unfortunately, Rat heads are also   very expensive.
Rat vs. Mouse

Cylinder heads dictate power potential from any engine, and it should come as no surprise that the Rat motor has this area covered with monstrous ports that can flow more air than a sewer pipe. Unfortunately, Rat heads are also very expensive.  View Related Article

 

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