Super Darius:
 

Eric,put on a center bypass like ii do,you don't loose power,and you gain sound!Valves still work,and they must work becouse they give you the right backpressure on low rpm.is not an expensive mod,and is easy to put back stock.Smiley

 

I am vorried this would be too loud in some neighborhoods or even tracks. 


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 964 Carrera 4 /  997.2 C2 ,  -20mm /  991 GT3 RS