I have the Fabspeed pipes, stock manifolds, but an Oettle (similar to Pedro) modified muffler. Sound is terrific (Evo Hi-Flo intake included); no resonance, but "baby" GT3 sound.
Works for me and everyone that hears my car is very curious of my setup.
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JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
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