[Bala]

I have a 2000 Bxster S. The muffler is Borla. Too loud for my taste (have to admit I do like it sometimes). Looking for a stock muffler. I know the S comes with twin tail pipes. I really don't care about the single or twin tail end. Are the mufflers model specific? i.e., do non-S 2.5 fit the 2.7 and 3.2 S? I have stock header and cats. Thanks,