How can you increase efficiency by adding to your exhaust? By that point you are just modifying gas flow. I would think you want to tinker with efficiency prior to or at combustion ... then again what do I know ..
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Thx NoCO2; "The biggest FE mod you can make is to adjust the nut behind the wheel"
I am a precisional instrument of speed and aeromatics
If your knees bent in the opposite direction......what would a chair look like???
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