Exhaust back pressure equals ? in hp gain
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I recently measured my back pressure in the center section of my stock exhaust system. I had 1 psi. After replacing my center resonator with a section of 2.5 inch pipe, the back pressure dropped to zero psi. Can anybody tell me how many horse power I should have gained with that back pressure drop of one psi? Techie out there somewhere?
Thanks
John
Thanks
John
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