This exhaust line carefully balances large diameter, straight-through exhaust flow with a carefully tuned, resonating-volume canister (Helmholtz resonator) to help refine sound and remove unwanted sound (drone) frequencies . The result is an outstanding complement to the pure sound of your high-powered Japanese turbo engine, with an exquisite appearance to match. The large diameter SUS 304 stainless-steel, mandrel-bent piping, tuned resonator and straight-though muffler are all tig-welded to perfection. Each system is made in Japan, by highly trained craftsmen with only the finest materials. Finishing off the exhaust is our unique rolled SUS 304, TRUST tip with an adjustment length of 40mm.