GTHAUS is pretty amazing. Soon will add either FI RHFC or ART pipes.
2013 G37 Sport Coupe 6MT. Stock cats
Here is my setup
GTHAUS - Y-Pipe/Mid-Pipe/Muffler
https://www.facebook.com/photo.php?v=4732878569125
https://www.facebook.com/video/video...=4732876649077