by Brian » Tue Nov 10, 2015 12:36 pm
I have that setup on our 2.5 liter Project Blue currently, sound is amazingly civilized when just cruising with the combo of SuperQ and the new Helmholtz midpipe controlling the sound level. Not quiet compared to stock but quiet compared to many other sports cars like a V8 Mustang or Corvette. If your passenger didn't know the Miata really well, they might not guess with this setup that it is aftermarket when you are in cruise mode. As noted in the product description for the midpipe, makes much more sound when you put your foot into it.