Isn't 2,5" too big for a d14?
My ek4 exhaust lines are 2,25" and if I remember right had a 47mm diameter on the d14.
I suppose you're going to lose some performance with this.
Correct me if I'm wrong
nice build, I have a same exhaust (second hand tho) i think but I havent fitted it on my ej9 yet. May you record some sound of the exhaust? If it is too loud I may not fit it to mine. =p cheers