According to the Sticky, "'03-'06 headers will NOT work on the HR's unless you use test pipes/HFC's/stock cats from a DE engine. Credits go to Gooey for this info.". Does this mean that Long Tube Headers for the DE engine will fit the HR since they replace both the stock shorty header and the cats?

 

According to this thread

https://my350z.com/forum/engine-driv...s-on-a-de.html

you can put HR headers on a DE... all you have to do is move the studs around. Idk if that hold true for DE headers on a HR.