does anyone know where i can find a straight-thru downpipe for my 08 6.7?

 

BADP is one delete company... Search google for 6.7 delete...

 

A 4" downpipe for an 04.5-07 5.9 will bolt up, you just may have to shave the inner flange of the downpipe to get it to fit over the turbo flange. Some brands you have to do this, some you don't. Either way it's no biggie. Finding one to match your delete pipe in length and the correct 3-bolt flange is another matter, however.