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Air filter restriction
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Air filter restriction
Air filter box restriction
Gallery
Piaggio exhaust featuring the cat hose
Drawing of a scooter exhaust with catalyst
Yasuni Z street legal “RaceLook” exhaust w/o cat
Naraku Traffic Touring Exhaust w/o cat
Increased length exhaust manifold
Inlet diameter restriction usually found on aftermarket exhausts
Exhaust dummy pipe usually found on stock exhausts
Shortened tuning manifold
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