Martin_B 10 Posted February 6, 2014 As per above, Looking to make a straight-through centre pipe for my Corrado - unsure of the bore size. Can anyone assist? Quote Share this post Link to post Share on other sites
vw rule 19 Posted February 7, 2014 Hello there, I think the 1.8 16v (KR) and the 2.0 16v (9A) have the same standard size / bore exhaust. The only real difference between them is the 1.8 has the hook type mounts on the centre silencer, and the 2.0 has a 6" long straight bar which the rubber mounts slide over. I think it's 2-1/4" OD (54mm) The ID is roughly about (52mm) Then where the pipe flairs out slightly where it has to slide over the end of the catalytic converter, this is about 58mm to 59mm OD And the end of the catalytic converter is about 55mm OD pipe is about 1.5mm thick. Hope this helps. Si Quote Share this post Link to post Share on other sites
davidwort 0 Posted February 7, 2014 As per above, Looking to make a straight-through centre pipe for my Corrado - unsure of the bore size. Can anyone assist? Don't, there's no benefit other than annoying your neighbours :) Quote Share this post Link to post Share on other sites