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Smaller Exhaust Pipe Diameter?

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#1 rob18

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  • LocationNewcastle
  • Car:Mk6 Fez ST & Mk1 C-Max

Posted 03 June 2015 - 11:38 AM

Planning on putting a new back section on my mk2 2.0 tdci. The exhaust on measures at 2.5" diameter, the section I want to put on (literally a bit of pipe going into tips) is only 2" diameter, will this cause me any bother or lack of power due to back pressure?