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Re: Best HorsePower Gains and Best Sounding Exhaust???
There are several ways to actuate 6-ports electronically. And its very cheap. All you need is a pressure source (air pump, etc), a solenoid, and a signal thats rpm activated.
Of course this is for S4 cars only.
Jarrett
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1988 10th AE Edition TII
More mods then you have.
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