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Old 07-08-2004 | 09:10 AM
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joebob
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Default RE: OS 91 FX Tach readings
The OS 91FX and the Magnum 91XLS are virtually identical in performance, and my Magnum on a Performance Specialties Ultrathrust muffler turns an APC 16x4W at 10500 on 10% Omega. With the stock muffler, it only turns around 9200.
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