I have to make my own downpipe for a t4 vband turbo. What's a good place to buy the flanges and tubing from. Especially interested in the little flares that go from 3 to 3.5 inch. Will there be a noticeable difference between a 3 in downpipe vs a downpipe that goes from 3 to 3.5 and then back to 3 again?

 

I have some of that stuff. Pipes/Bends/Elbows

 

most any fab shop should have that. we always stock it, but someone local to you like speed element or ff-tec should have it

 

I am wondering the same thing also. I want to make a clean new downpipe as mine has been bastardized after a few setup changes and am wondering if there is any benefit to make it 3" V-band to 3.5" tubing back down to 3" 2-bolt flange as I don't want to change the rest of my setup. Is it worth the trouble going 3.5" for only that portion? Setup is a 3582r/1.06 on a streetport @17psi.

 

Hey Jason, are your down pipe for ebay manifolds ss or mild steel. Do you know if the pt. 6266 uses the same vband flange.