This is just compiled from various internet sources including this site, and may contain various errors and bad judgements due to marketing hype But I just wanted to compare these before I picked one out, and thought others might like to see.
Also, keep in mind that a 34% stiffer might be 134% as stiff or vice versa. Use your best judgement. I used the slash notation for “front / rear”–it’s not fractional.
Let me know of any corrections, and I’ll fix them. PM me and I’ll be able to update faster.
Thanks to everyone below for making corrections and adding new information!
350EVO
type: solid
diameter: 32 / 25mm [1]
stiffness: 11-33 / 25-53%
includes: bushings [3]
shape: rear bar is straight, without a curve to go around exhaust pipe
comment: de facto racing bars; best high-end value
installation: http://my350z.com/forum/showthread.p…ht=350EVO+Sway
Cusco
type: solid
diameter: 35 / 22 mm
stiffness: 120-137 / 173%
comment: very good, but expensive
H&R
type: solid
size: 36 / 23 mm
comment: not out yet
Hotchkis
type: tube
size: 35 / 24 mm
weight: 13.5 / 5.5 lb
stiffness: 9-32-63 / 54-92-146%; both 5-way [4]
includes: polyurethane bushings, brackets, silicone grease
comment: best value for the average street driver
installation: http://www.hotchkistuning.com/bin/in…ions/22413.pdf
Whiteline Automotive Australia
type: solid
size: 32 / 20mm
stiffness: 2-way / 3-way [4]
comment: one U.S. distributor
NOTES
[1] Prototype size listed for rear bar; corrected with production size
[2] Corrected measurements
[3] Possibly listed incorrectly as polyeurethane bushings. They are a yet unknown black substance
[4] “N-way” adjustable means that asymetrical pairs of holes can be used to achieve in-between adjustments
[5] I think I got mad at someone else’s website and inadvertently blamed it on yours. Sorry.
But I just wanted to compare these before I picked one out, and thought others might like to see.