DE= old engine 276/296 bhp
HR= new engine 309 bhp
I made my own grounding cables. 25mm multistrand copper cable with crimped cable lugs. Easy when you are a sparky.
Thanks for the explanation. I knew there was an older and a newer engine, but I had not heard those terms used to describe them.
Full explanation here
http://www.350z-tech.com/zwiki/Category:Engine