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a 2.7 MFI with short mufflers, misses between 3,200 and 3,800 RPM, When I put the hollowed out OEM muffler back on it runs OK. I race vintage and the car is too quiet, if you can't be fast at least be loud

  • 1974
  • 911
Mileage: 
88 000
Engine
Gibsonia, 
Pennsylvania

2.7 MFI engine running two short mufflers misses between 3,200 and 3,800 +/- a few hundred RPM. When I put the hollowed out OEM muffler back on the problem goes away. What options do I have if I want to run the louder mufflers. I love the sound, just can't race with the miss in that RPM range.

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