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Old 03-14-2016 | 06:43 AM
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warhwk
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From: Meridian, ID
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I answered my question on the muffler tubes. Cutting off the knurled portions raised my peak rpm by about 200. I am now getting a solid 7200 out of my Xoar 20/8 and the Bisson Pitts. Nice, but still not enough.