does anyone know if the JDM FD2 muffler design is the same like JDM DC5?
as in, it has valving design?
Variable path Exhaust pipes
The Type-R equips a new exhaust muffler that is constructed of variable pipes. The design can change silence priority by leading exhaust gas flow to variable paths with a silencer. At a low rpm region, silence priority becomes first. Sound is reduced and air current is reduced at the same time. As engine speed reaches near the 5,000 rpm, higher exhaust gas output becomes the priority that desires less back pressure. This design bumps up an extra 4 hp and 0.8 kg-m, than the predecessor model. Comparing at 8,000 rpm, about 1/3 of backpressure remains, therefore a large improvement
in the power output was achieved at the dual e-type exhaust pipe. Moreover, sport nature was emphasized by the adoption of a larger diameter finish.
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