So, I have a 2007 sedan with the newer HR engine. A local shop said that by upgrading to short ram intake and Stillen or Borla exhaust, I will get 20+ more hp. But, because the 2007 already has a pretty good dual ram air and improved exhaust (over DE engine in earlier models), will I really see that much improvement? I’ve found similar threads, but none specifically addressing the difference between how similar upgrades affect the DE vs. HR engines. I get the impression most advertising claims refer to gains for the older, DE package.

If I have VQ35HR in my 2007, do I have V36 (I've been assuming so)
Can anyone direct me to a thread?

 

hope this helps:

https://g35driver.com/forums/tuner-d...d-hr-350z.html

and yes your chassis code is V36

 

I just read that thread, and he never re-dyno'd on the DJ. Or, if he did, he didn't post it. No way he made 318 with an AT and only bolt-ons and reflash. I don't think he went to the track either.

IMO, dyno numbers are worthless anyway. ET and mph are the only "true" numbers to go by.

 

Are 2 threads really necessary
https://g35driver.com/forums/g35-37-...vs-vq35de.html

 

go with cold air....

for me with injen cold air intakes/fast intentions exhaust/TS ecu reflash- i gained roughly 30hp.

I would say intake gives 5hp, exhaust 10hp, and ecu reflash 15hp.

271rwhp on a dynojet. 13.5@104 in the 1/4 mile at steele, AL.