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Exhaust valve - 2.5" - 63mm opening by vaccum
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3 months warranty
This exhaust valve is to be placed on your exhaust line.
The principle is simple: the valve open when you accelerate, works with the inlet vaccum.
For N/A motor
This principle would have a more liberated exhaust line by simply revving, but without the constraint of a muted eg to limit noise.
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