i don't think they are interchangable. and if you decide to go with the I/H/E route, the amount of money you put into those can come close to the cost of few turbo components. i'm not that familiar with the 8th generation platform, so i don't know about it's F/I possibilities, especially with the new sensors and technology they use. plus like rhdekhatch said, if you begin to mess with drivetrain components, it may void your warranty on the vehicle.

 

welcome to hcf, nice lx i like the nighthawk black it looks good

 

good choice on the nbp, thats what i went with as well.
ajp has a turbo out at the moment, but there are some tuning issues be figured out at the moment. The r18a1 does really have a header. There is a highflow cat/header for out car being made. With the first few test there was a major over heating issue.
you can buy a megan racing downpipe along witha magna flow cat back, and if you want a little more hp you cant purchase the nst light weight pulley kit.

 

what was the website which you got all this info from?