Originally Posted by P_Diddy

EDIT: I don't have a G35 anymore so I don't really check the tech forums anymore. If you have updates for me to add to this first post, please PM me w/ the info and I will add it.

Hey everyone, I thought it would be a good idea to create a thread w/ a summary of info for sway bars. Please add posts and I will try to update this original post with your information so that people can see a lot of info in 1 spot. Hopefully people will do a search and find this thread.

Please help to fill in the blanks below....

Hotchkis: updated info on 1/3/08, thanks Texasscout
Construction: Front 1 3/8" (35MM) Tubular (Bar Weight 13.5lbs)
4 Position Adjustable; Rear 15/16"(24mm) Tubular (bar weight 5.5lbs)
3 Position Adjustable. Includes greasable bushings and brackets. Bars now come with welded retaining rings/collar stops The back bushing have grease zerks on them now. Front bushings still must be removed to be greased.
Bushings: rubber?
350Z & 03- 05 G35 Front:
Hole 1 = 1525 lbs/in (22% Stiffer than stock)
Hole 2 = 1845 lbs/in (48% Stiffer than stock)
Hole 3 = 2270 lbs/in (82% Stiffer than stock)
Hole 4 = 2855 lbs/in (129% Stiffer than stock)

06 G35 Front:
Hole 1 = 1525 lbs/in (5% Softer than stock)
Hole 2 = 1845 lbs/in (15% Stiffer than stock)
Hole 3 = 2270 lbs/in (42% Stiffer than stock)
Hole 4 = 2855 lbs/in (78% Stiffer than stock)

Rear:
Hole 1 = 520 lbs/in (80% Stiffer than stock)
Hole 2 = 655 lbs/in (125% Stiffer than stock)
Hole 3 = 840 lbs/in (185% Stiffer than stock)
Approximate Price: ~$260
Pros/Cons/Experiences/Settings: some people complain about squeaking w/ Hotchkis (but I've read that you should just put more grease on them)
The bars do not incorporate bushing “stops” to locate the bar. Some people have noticed the bar shift to one side or another. The fix is to purchase a pair of “collars” from McMaster Carr (part Number?)


Stillen:
Construction: 1 3/8-inch diameter (front) and 7/8-inch diameter (rear) tube bars
Bushings: None included (re-use OEM bushings or buy aftermarket ones)*
Stiffness settings for the front/rear sways: from 7% to 70% stiffer than stock
Approximate Price: ~$275
Pros/Cons/Experiences/Settings: Excellent construction, excellent packaging & instructions, reasonable price, no noise. No cons. kenchan drives on Front soft / Rear med. tgenius drives Front med/ Rear med for his sedan.


*Polyeurethane Bushings compatible w/ Stillen sways:
Summit racing carries the bushings too for less than suspension.com.
Prothane part # 14-1115 - 13.99
Prothane part # 14-1116 - 19.39 Possibly backordered though
(info courtesy of sin4me)

*Energy Bushings for Stillen Sways:
ENS-9-5168R for the front 1 3/8" bar
ENS-9-5158R for the rear 7/8" bar
and they are $36+ shipped. (info courtesy of Jamaica2G)


350evo:
Construction: cold formed, high strength aircraft grade steel, powdercoated finish
Bushings: polyurethane
Stiffness settings for the front/rear sways:
Approximate Price: $360
Pros/Cons/Experiences/Settings: Front/rear bars can be purchased separately.


Nismo:
Construction: Front: 36mm, hollow steel, Rear: 22mm, hollow steel
Bushings: firmer bushings with higher density rubber
Stiffness settings for the front/rear sways
Approximate Price: ~$440
Pros/Cons/Experiences/Settings: Nismo has warranty


Eibach:
Construction: Front bar diameter: 34mm, Rear bar diameter: 22mm
Bushings:
Stiffness settings for the front/rear sways
Approximate Price: ~$350
Pros/Cons/Experiences/Settings: Million Mile Warranty


Cusco:
Construction: Front: 35mm, Rear: 22 mm
Bushings:
Stiffness settings for the front/rear sways: Front - 120% and 137% stiffer than stock. Rear - 173% stiffer than stock (22 mm).
Approximate Price: ~$470
Pros/Cons/Experiences/Settings:



Progress:

Construction: Solid; Front bar diameter: 27mm, Rear bar diameter: 22mm; Powdercoated graphite finish
Bushings: Polyurethane
Stiffness settings for the front/rear sways: Fronts non-adjustable; Rears are adjustable
Approximate Price: $260?
Pros/Cons/Experiences/Settings: Front/rear bars can be purchased separately