HKS Centre Pipe Impreza/Imprexa STI GH8/GRB

Features

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)

* 2:about main materials for configuration diagram
exhaust/db/img/sus304.gif"" alt=""SUS304"" width=""40"" height=""10"" style=""border-style: none; border-width: initial;""> : SUS304/high quality stainless steel
exhaust/db/img/sus409.gif"" alt=""SUH409"" width=""40"" height=""10"" style=""border-style: none; border-width: initial;""> : SUH409/stainless steel material that are used a lot for stock