Is the DC JDM 4-1 header the same length as the JDM ITR/Toda header, or is the ITR/Toda 1" longer? What is the total cat length needed for USDM b-pipe?

I searched a bunch, but 'm having trouble finding a definitive answer. I have a Carsound cat already, but need to insure it's the right one.

 

DC JDM 4-1 is same lenght as JDM ITR 4-1 and considering the Toda header bolts straight onto a JDM ITR then the Toda and DC are also the same lenght!

 

in other words, all the same

 

Emmm....yes that would be another way of saying it!

 

And all JDM headers are 1" longer than USDM, yes?