For your ITR you could use 4 different SMSP headers.

The 1 piece 4-2-1 mild steel (recommended to be coated) however you can't use the ITR tranny/block brace but ground clearance is excellent

Multi piece "GSR" 4-2-1 style header in 100% stainless however you can't use the ITR tranny/block brace but ground clearance is excellent

Multi piece ITR 4-2-1 style header in 100% stainless and you can retain the tranny/block brace but ground clearance isn't as good as the above 2.

1 Piece 4-1 100% stainless header (available late summer)

All the above will require at least a custom length cat or test pipe, but I don't recommend test pipes for the street.

My exhausts come in kits and therefore require welding during installation. My website has a menu of items to choose from to customize the exhaust to your liking.

Just FYI, the A/F tuning done in the above linked header test was not extensive and the A/F ratios were not linear as one would believe from reading the write up.

For example here is the link to the A/F curve versus torque for my 1 piece 4-2-1 mild steel header.

http://www.imagestation.com/picture/...a/f3fa8552.jpg

BTW, I just had a customer who recently sold his Toda header and got a 1 piece mild steel header.