Yes there was a factory item, wasnt too much chop from what i can see.
The question is do you want to chop up your supra?
I ran a 4 inch pipe from under the airbox to the front bar. Works very well, requires a large chunk of metal to be removed under the airbox and in the tire well also to fit the pipe.
the intake pipe can be replaced with a mandrel bent setup that any exahaust shop could fabricate.