I received my high flow cats from a friend and the box says that they are for a 350z/370z. I am assuming that these are for the HR motor since they included the 370z in there. So these are for the 07+ 350Z and the 370/G37. Will I be able to run these without problems on my 06 Revup DE?

 

I'm not 100% sure

but i think they'll fit

 

No they wont fit. HR motors uses different size cats. If you want to use them u have to use headers for the HR along with cats for the HR