Designed for street use, the Legalis R improves low and mid range power. It keeps a quiet and deep 87 dB tone as not to catch much attention and uses completely stainless steel mandrel bent piping. This axleback uses 60.5mm piping and exits via 1117.6mm tips. This is perfect for your daily driven G37 coupe and will net you noticeable gains in power. The system includes all gaskets and hardware for installation.