I have a Racing Beat Power Pulse Muffler with Non-Resonated Sport Mid-Pipe. This was originally a 1.6 application but I had a muffler shop weld in an O2 bung so that I could use this on my NA8. This will fit either 1.6 or 1.8. 6'ers will just have to cap off the O2 bung and you're good to go, everything fits the same. $350 picked up in Corona, CA.