When the valve is open, the exhaust gases from the turbo goes straight out the dump portion with no restriction or back pressure. This gives a loud race sound that some truly prefer. When it is closed, the exhaust gases go through the now catless pipe and into the stock or aftermarket muffler. This keeps the exhaust tone tame and tolerable for most. By not have a cat for race use, the restriction is eliminated, but not completely.
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C$379.00 Regular Price