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Graupner Sonic Pro 10x6 & 11x6 I going to break in a brand new FA .40-a with the 11x6 using both the stock muffler and a turbo header. The side profile kind of reminds one of a Sea Gull's wing, a very efficient air foil if there every was one.
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Hobbsy May 3, 2018
Graupner Sonic Pro 10x6 & 11x6 I going to break in a brand new FA .40-a with the 11x6 using both the stock muffler and a turbo header. The side profile kind of reminds one of a Sea Gull's wing, a very efficient air foil if there every was one.

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