Just installed Eibach front & rear anti-roll bars a couple weeks ago. Some insights:

• When initially set to (F:hard, R:med) the car exhibited more easier rotation with the throttle (read: rear wanted to step out), seemingly quicker turn-in, but also some mid corner understeer (under constant throttle).
• When the sways were installed, the front driver's side was making noise (clunking) on EVERY bump/dip. It was really annoying. Went back to installer and he re-lubed the bushings and it fixed the problem.
• I ended up changing the front from hard to soft setting. This was definitely noticable, not the body roll, but in daily driving harshness. On the hard setting, slight bumps/dips on one side was harshly transferred to the other side. At the soft setting, this is greatly minimized.
• I left the rear at medium, as it already exhibits a HUGE increase in stiffness from the stock rear swaybar (I have a non-sport).
• As far as driving dynamics, you can definitely tell that there's less body roll. Car is very planted through high-speed corners (e.g. clover freeway offramps), BUT there is also a noticeable increase in side-to-side stiffness in everyday driving. Uneven roads, potholes, and bumps/dips that are not taken head on will have the car reacting much more than stock.

 

Re: Stiffest OEM Anti-Roll Bars:
G37 AWD Front with Nismo Z Rear.

The complete Nismo Z set is the same as the Nismo S-Tune Z set.
It also happens to be the same thickness as the Nismo V36 set.

However, the S-Tune Z and G sets have different part numbers according to the 2016 catalog.

Any reason why 370Z ARBs won't fit a G Sedan?

 

Hi,

I am looking to buy OEM RWD Swaybars for my G37xs.

Can someone confirm these are the correct ones to buy from ebay:

08-13 infiniti g37 coupe oem rear suspension stabilizer sway bar .. | eBay

OR

http://www.ebay.ca/itm/09-13-Infinit...5Xwgd6&vxp=mtr

 

Is it safe to assume the Q40 AWD Sedan has the same pathetic rear sway bar as the G37x Sedan?

 

Well...to answer my own question, yes it looks that way per online Infiniti parts trial and error using the part numbers provided on page 3 or 4 here with AWD and non-AWD Q40 cars.

Thanks to all for posting this information!

 

Bought the rear non-AWD bar (562301EA0C) off eBay last week for $70. It came with brackets, bushings, and end links with free shipping in like new condition. Installed it yesterday morning. WOW! Changed my car from a snowplow to a canyon carver.

 

Just had the 370z nismo rear sway bar installed which I believe is 25.4 mm. Front is the stock X bar. Suspension is stock otherwise.

Went to an empty parking lot and started testing it out and yup the rear comes out pretty easy when pushing it. Have to try and get used to this lol.

 

Much better than understeer, right?

 

Same sway...the answer is yes.

That said, I was making a left, from a dead stop, at a light and went heavy on the throttle...rear started stepping out which made for a Fast & furious style turn but caught me off guard a bit. Strut bar will be the next upgrade.

 

Definitely. Feels like a sport sedan now.

 

is this the correct number for the nismo rear bar? Thank you
56230-6GA1A

 

A few months late, sorry, but this thread has been running since 2013 and I now have the privilege of bringing it into 2018!

The following data is for the rear sway bar only:
The 56230-6GA1A appears to be for the 14 (or 15?)+ 350Z and i believe it is 26mm.
Prior to that the 350Z Nismo part number is 56230 1A30C and it is 25.4mm
The 350Z base rear bar is 56230 1EA0C and it is 24.2mm (I just ordered one of these from Ebay for my car)
Other rear bars of mention:
G37 and 14-15 Q60 Coupe Base RWD and AWD: 56230 1BA1B at approximately 21mm (I measured mine with a $ store micrometer)
G37 and 14-15 Q60 Coupe Sport RWD 56230 1BA0A at 24.2mm
G37 Sedan AWD 56230 JK000 and it is 17mm (according to this forum)
That is about all i could find.

I researched it by putting in VIN's (from Ebay sway bar donor vehicles) at Infinitipartsdeal.com

 

So I just picked up a 2009 G37 RWD coupe bar off ebay for my 2013 X Sedan. This is the 24.2mm bar correct?

 

G37 Sport Coupe has a 24.2mm bar as does the base 370Z. I just purchased a 370Z bar and it measured in the 24mm+ range. (I need to buy better tools...)
The base RWD coupe is between 21mm to 22mm. I had a hard time trying confirm which EBay G37 bars were sport and base so I just went with the 370Z base.
Hope this helps.

 

Installed a 15 Nismo RSB in my 08x sedan and it completely changed how it drives, it turns in much nicer and gone is the plow understeer! highly recommended modification