Its as short as all of them and as long as all of them. Lol what question is that??? My filter is right above the hole were the resonator would normally be in.
If you have a money-tree in your porch/balcony then by all means do it...if not use your cash elsewhere.
If you want to absorb some of the heat caused by the engine bay then maybe you should buy some piping bigger then the intake size and mount the intake inside of it...causing the bigger piping to act as a heatshield/heat absorber.
Would i do this for just a street driven car though...NO