Center Pipe HKS 33004-AF002 Subaru Impreza GRF/GRB/GH8 EJ25 07/06-10/03
It's more big in pipe diameter which let the exhaust gas smoothly to the muffler and have better engine performance.
We used SUS304 that has durability and great appearance.
GRF: Close noise level Stock:L84 R83 LEGAMAX Premium installed:L89 R88
GRB: Close noise level 84dB (LEGAMAX Premium installed),
[specC] is ok Close noise level 89dB (LEGAMAX Premium installed)
GH8: Close noise level 85dB (LEGAMAX Premium installed)
Pipe size: 65mm