So that my results are taken in context. I fitted the 2.5" piping to the street car but did not modify the Stillen Intercoolers inlet/outlets. Yes I acknowledge that not doing that creates a restriction but my throttle bodies are 60mm so that also is less than 2.5". Not to mention the restriction of the intercoolers themselves. As the whole system is under pressure, I do think the gains for the 2.5 piping are minimal 'bang for buck'
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