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Old 09-01-2007 | 10:46 AM
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Sport_Pilot
 
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From: Acworth, GA
Default RE: Mac muffler on Supertirge Bluehead

I recall that the Bluehead ran fine on 10% nitro. Some of the older engines did not like excessive backpressure. You may need an idle bar muffler even with the PDP and STS ported versions.