This is a Kakimoto R exhaust from exhaust parts specialist, Kakimoto Racing. These exhausts are full stainless mufflers which are very high quality and give off a great sound. The increased dimensions of the Kakimoto exhaust will give you great exhaust flow and an increase in power. The Kakimoto R also features a pre-muffler/resonator to help muffle engine tones, keeping sound at a reasonable level. Get this and all your JDM at RHDJapan!!