I recently purchased a 370Z RSB from an ebay seller. The same seller just informed me that he has another 370Z RSB for sell although it's not yet on auction. He's doing a part out on a 2015 370Z. You can reach the seller via this auction:

Cataly Converter off of a 2015 Nissan 370z Sport driver side

 

I may have missed it, but how much of an upgrade is this over the rear X sway bar?

 

I purchased a 370Z RSB as well, from Ebay. The OD is 24.2mm so its a nice upgrade over the stockX RSB at 17.7mm. You can usually score one on Ebay for well under $100. I think I paid $75 shipped to my house with bushings, mounts, and end links - all used of course.

 

Impossible for me to tell because I had coilover's installed the same day. I acquired the beefier RSB to attempt to cover all the bases.

 

Makes sense. I had the Hotchkis on my car at one point and never really could tell much of a difference.

 

wat? the hotchkis bars are a massive difference. I mean I guess if you never push the car you won't notice.

 

Yea I don't know how you could not feel the diff with hotchkis. Seriously, if you don't ever push it then what was the point?

 

Yep, same boat, hotchikis was the best bang for the buck upgrade, imo. Completely different feel and amazing difference.

 

Push the car on a daily basis on my 21 mile commute each way

 

Have you tried driving it? I hear it works much better and a lot more efficient.
(Granted, you might not get as good of a workout this way..) heh heh

In all seriousness, if you did not notice a difference between the stock (anti) sway bars and hotchkis, you either installed them wrong (?) or aren't really driving it enough to see the difference. Even going from sport sway bars the difference was obvious; even my woman who's completely oblivious to car things noticed how much quicker she can go through certain sections of her commute.

 

There is zero chance they were installed wrong lol. It's definitely not the most difficult install and they can only go in one way. I tried all the different settings as well. If I even noticed a difference it didn't justify the price tag to me personally.

 

It was the Hotchis price tag, and reports that it was potentially a bit "stiff" that persuaded me to acquire a 370Z RSB. The part I acquired was reported to have 7500 miles on it before being swapped out. Here's the 370Z RSB I had installed.

 

K6030-JK71B Infiniti G37 Sedan Rear Spoiler NEW OEM!! K6030JK71B

Sedan OEM Spoiler in White and silver from an ebay seller, has them for $190 each and $15 shipping.

 

Fram filters have $2 off right now. Got mine down to <$11 with s&s.
CF10743
Last time I paid $16, I think, so this is quite a bit better.

 

Vossen CV7 Wheels 19x8.5/19x10 - "NEW" $900

Vossen CV7 Wheels 19x8.5 / 19x10 - 350Z/370Z/G37/G35 | eBay