downpipe
 

Will a 04.5 to 07 downpipe fit an 03 to early 04

i think it might.
the size might be the only issue.

What do you mean by size are you meaning whether its a 4 or 5 in downpipe or the size of the end that connects to the turbo? And another question is does anyone make a 5 in downpipe for a 03 5.9 CR

dont know if this will help but on my magnaflow 5'' the first 4 to 6 inches look to be the same as the stock one that i removed then it goes out to the 5'' the rest of the way

ttt