Haha actually there was like 3 versions before those too. The first version had a flat resonator, then they made them rounded for midrange power, then start polishing them but beads landed up inside the resonator. Then they made ceramic titanium coated (that's what I have), then they began the polished ones again, and now they finally have tabs on them and they removed the steel wool. Haha these will undoubtably change again.
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2010 40th Anniversary 370Z
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