Unfortunately I took a digger a few weeks ago and bent my header pipe on my 2001 426. I picked one up off EBAY and was told it came off a 2002 426. I now have the pipe and trying to install it. It is bigger in diameter at the muffler end and it doesnt seem to line up properly at the cylinder head. I am guessing maybe it is a 450 pipe from like a 2003? Anyone swapped pipes or know what will interchange? Thanks.