Before this i already change piping 2" and straight flow.but i still use standart extractor.The pickup is good.But today i change the extractor 4-2-1 (Zenden).
What i feel after change extractor:
-The pickup at low end not so good but i never test at mid end n high end.Before this pickup ok for low end.
-I feel at muffler (Tabung Belakang),the air flow is slow.(Feel use my hand).Before this air flow at muffler so fast.
I think...
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