I disconnected the battery during the install and reconnected when done. But I have no idea if it's needed or not. The HPS tubes and drop-in filters is a nice enhancement and I do notice it on the butt-Dyno.

Next mod for me is the CUSCO oil catch can. Although finding a place to mount it should be interesting.

Thread dredge for any late (later than me) buyers:
The red versions of the HPS tubes have a longer-than-usual (vs the black version) breather port. I nearly cut them to half the length, on both sides. I could've cut the passenger a bit more, too. I believe the blue ones are the same story. See product pics and compare them with the black ones.

Went with these over the Z1's because I was thinking they'd be less of a wrestle and the presumed lesser stiffness would kinda be nicer against vibrations. Part of me kinda wishes I went the Z1 route and added breather hoses at the same time, though.

For noobs, this is doable without unplugging the MAF sensors and undoing the strut bar, or using grease. I don't even lift. Undo the air boxes and front engine cover, though. Really the only hurdle was the breathers. I took off the driver's side altogether since the resonator on the stock tube was in the way to pull things off safely in my mind.

Perspective of gains is what's already been discussed in this thread. Standalone (I'm still waiting for my aFe drop-ins), I just don't believe there's anything to expect by principal. At most it'd be at higher rpms, but very marginal because it's not literal forced induction. There's no reason to believe Nissan purposely supplied ****-flowing OEM tubes for what is a vacuum scenario. In combination with filters, however, I can make sense of Jordo's results.

I have tons and tons of details and dynos here if you havent already found it:
http://www.the370z.com/south-east-re...-thread-6.html

There's some useful info earlier, but starting from p. 6 onward is probably most informative :tiphat:

That post with the Cobb+K&N combo was exactly what sealed the deal for me.

I didn't catch if the K&N vs aFe gains were confirmed, and with today's test drive I didn't notice anything, but it's a small gain so that was expected.

In general it's still a gain in being pitted with buying replacement filters repeatedly in the long run. It's a nicer looking/finished filter as well. That plus never bothering with bumper removals/mounting relocation/cutting/heat soak and vibrations vs long tube CAI's, it's as safe as mods come.

I'd probably have gone with G3's if my Z was a weekend car instead of daily.