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Will the mufflers off a 3.8 "S" engine also fit on a 3.6? I know that the mufflers on a 3.6 have a smaller diameter exit pipe, but are the inlet pipes on both models the same diameter? I'm hoping that a set of "Gundo'd" mufflers off a Carrera "S" will fit my C2 but can't find a reference anywhere to the size of the header pipes on either engine.

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I looked up the mufflers reference number on Porsche.com, they are indeed different on the 96.05 and the 97.01 engines and that probably because of the exit pipe, I am not sure that the exit diameter would be smaller it is probably centered differently due to the different tail pipe design Cats have the same ref numbers for the 2 engines, therefore the inlet pipe will be the same diameter, also the connecting sleeve has the same ref number... and both engine can have the XLF ( Porsche Sport Exhaust ) as optional, and for this there is only one type of muffler ( actually 3 references for the different region noise tolerance but they would look identical from outside ( I know from experience)

Good luck!!!

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Thank you. Appreciate the time you spent checking this for me. I'm looking at a used set that have the "banana" mod that adds the additional pipe from the far side of the muffler to the crossover area of the exit pipe. Supposedly puts out the same sound volume as the PSE. The price is right, so I might as well try them.

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I recently purchased a 2003 996 twin turbo with 12k miles garage queen no track use. It was performance tuned by Behe and it runs great no turbo lag. However, the car is way too quiet (I also have a 911SC that sounds better than the turbo). I am thinking of either putting 200 cell sport cats(Fabspeed HJS) and muffler bypass pipes. Anybody have any experience with the bypass pipes? My fear is I will lose too much low end torque if I reduce the back pressure that much. The other option I am considering is the Fabspeed muffler bypass X pipe or Maxflow muffler. Anybody have any experience or knowledge about any of these options? Thanks for any help.

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