I think those are there to maintain back pressure for low-end torque and response time.

glad you went with the hks and im glad i could help you out. the dynos are weird though. im going to get mine dynoed and tuned june 15th so im curious what im going to make. congrats AK and i hope you like it!

i think i remember hear that those cans next to the mufflers act as resonators (Helmholtz perhaps) at low RPMs to help noise and scavenging but are bypassed at higher RPMs when it is better to have the exhaust free flow as quickly as possible.

Hey...that looks just like the side of my house...and the box that UPS delivered just before it went missing! If you look closely on the box it states: This exhaust is specially made for installation on a 2009 Pearl White 370Z. Dammit AK!

Glad you went with the HKS AK. I love mine and I am sure you will love yours. The note will change a bit after about 2-3k miles, a little more low end rummble and tons more of that pop, pop, pop sound when you barely touch the peddle on idle. When I almost hit red line and shift this thing sounds like some kind of high end exotic car pure amazing, made me fall in love with the VQ37 all over agian. I love it. To bad I need to sell it to someone that wants to pick it up in Texas becuase I am going turbo. I might do a custom HKS turbo exhaust though :) HKS FTW, oh and I love that d@m go pro you got, I got to get one for sure.

Awesome exhaust AK and I'm not just saying that cuz I have it too :tup:. I'll be doing a post about it soon as it's long overdue but I will share a few things here. I also like how it has a nice tone but is not overbearing. It makes me think it will still sound reasonable with cats on it later. I think some people don't consider that when they listen to sound clips of the cat back alone then put cats on to find it's annoying.

In terms of power I'm going to say it's on par with the others. My car gained a few HP over the true dual that comes on the Nismo stock, making just over 300 to the wheels peak. It would make a more dramatic difference over the regular exhaust on the Z.

It doesn't come with silencers, the bolts you see on the side is to adjust the tip in or out more.



Those extra canisters are tuned resonators. The are there to reduce the amount of rasp inherent on the VQ engine somewhere between 3k-5k rpm. Just recently HKS changed the muffler section to fine tune those also.

As far as tips for Nismo owners (which I will expand on in my post) There is another tip they use on the G37 version that is longer that if you really want you can buy seperate (since the Nismo bumper comes out more). It's not really necessary and is a matter of taste, up to you. Also on the drivers side rear section (muffler section) there is an additional hanger bracket that must be removed to avoid the exhaust from hanging crooked. HKS had made supplement instructions now for Nismo onwers :tup:. I don't want to seem like im thread jacking though so I'll save it for later. Again sweet exhaust AK!

This is the paragon of how exhaust reviews should be. Excellent work my friend. :tup:

Sounds amazing for sure.

:tup:

Thanks everyone for the kind words. It's a beautiful exhaust that sounds Great!


Baseline was the same HP/TQ. Hence we are thinking something was up (on the dyno). Past 6500 RPM, the tach needle was bouncing (and dyno registered a lot of "noise") :(.

NO. This is in ATCO, NJ. (IIRC, MRC was North Jersey).

HKS always stands by their products. When HKS first made these Hi Power exhausts, they used a base (non sports model) as a test mule. So, there was a small issue with midpipe . HKS then sent FREE updated midpipe to all the owners that installed the first gen exhaust! :tup:

I'll keep it in mind. Thanks.

:bowrofl: between THE370Z decals and these HKS ones, my car drives like it haz VTEC in it! :roflpuke2:


lol.. yeah.. I couldn't even drive properly because there were stop sign on both end. I have to find a better place to video.

lol.. the place I shot the video wasn't the "best" neighborhood. I was nervous about this too :ugh:


:bowrofl: lmao! I called HKS Corp. and they told me that Pearl White and Monterey Blue exhausts are interchangable! :tup:

Thanks for the information :tup:. A good exhaust should sound good in ALL RPM and have the least amount of drone (if any) on the highway .

http://i576.photobucket.com/albums/s...Z_com/hks1.png

http://i576.photobucket.com/albums/s...Z_com/hks2.png

When HKS makes their exhausts, A lot of research and development goes into it which is a good thing. :tup:


HKS is actually working on a new exhaust for the 370Z. It's called the HKS SSM (Super Sound Master) :excited:

http://i576.photobucket.com/albums/s...com/ssmhks.png
Click on the picture to launch video

Ah ok ....The shop looks the same

On deceleration, is there any crackling,burbling, popping noises?

How far is Akuma from you, AK? I'm sure if you told them you run the largest 370Z community they might give you a deal on a few dyno runs. :tup:

Looks and sounds good! Now put some Eibachs on that bad boy! :tiphat:

Actually what happened was HKS made the initial prototype and sent it to Japan. Japan made the jig and sent a production sample to HKS USA to approve (this is how all systems are made). HKS gave them the go ahead for production because the sample was an exact match. In an unusual mistake HKS Japan welded the brace between the sub resonators upsidedown on the first production run causing it to touch the drive shaft I think.

Here is a pic I took from the link AK provided on the first member to have an issue (bad):
http://img.photobucket.com/albums/v2...2win/003-2.jpg

Here is a pic of AK's exhaust (good):
http://i576.photobucket.com/albums/s...z/DSC03727.jpg

You can see how it was inverted.

Anyway I was told when I was there for the Nismo test fit that that first batch was resolved a long time ago and all systems shipping have the properly aligned brace.

that Super Sound Master exhaust sounds loud