Manufactured from cold-formed, tubular high-strength aircraft-grade steel for precision performance, and finished with a long-lasting red powder coat finish, the ANTI-ROLL-KIT comes complete with all necessary mounting hardware and instructions for easy bolt-on installation for your 2009-2011 Nissan GT-R. 
 
ANTI-ROLL-KIT Part# 6389.320
o Performance Tuned Sway Bars for Improved Handling and Reduced Body-Roll
o Perfectly Balanced for Optimum Neutral-Steering Handling and Precise Turn-In Response
o Precision Engineered and Calibrated for PRO-KIT and SPORTLINE Performance Spring Kits
o Eibach Hi-Tensile Steel Alloy, Cold-Formed, Tempered and Shot-Peened for Long-Lasting Performance and Durability
o Greasable Urethane Bushings For Increased Responsiveness
o Precision Forged Ends and OEM Style Pressed Bushing Locaters (No Welding Or Weak Points Here)
o Million-Mile Warranty
o 
ANTI-ROLL-KIT NISSAN GT-R 2009-11 DATA:

TECHNICAL INFORMATION
FRONT:
OE bar: 34 mm (1.34 in) tubular
OE measured bar rate: 95 N/mm (541 lbs/in)
OE bar weight: 5.5 kg (12.1 lbs)

Eibach bar: 35mm (1.38 in) tubular and adjustable
Eibach measured bar rate: 2 position adjustable
P1 = 171 N/mm (975 lbs/in)
P2 = 184 N/mm (1049 lbs/in)
Eibach bar weight: 5.8 kg (12.8 lbs)
Bushings: New urethane bushings with grease grooves.
End Link: OE

Approximate installation time: 1.5 hr 

REAR:
OE bar: 14 mm (0.6 in) solid
OE measured bar rate: 3.7 N/mm (21 lbs/in)
OE bar weight: 2.0 kg (4.0 lbs)

Eibach bar: 16mm (0.63 in) tubular and adjustable
Eibach measured bar rate: 5 position adjustable
P1 = 5.0 N/mm (29 lbs/in)
P2 = 6.0 N/mm (34 lbs/in)
P3 = 6.8 N/mm (39 lbs/in)
P4 = 7.4 N/mm (42 lbs/in)
P5 = 8.0 N/mm (45 lbs/in)
Eibach bar weight: 2.5 kg (5.5 lbs)
Bushings: New urethane bushings with grease grooves
End Link: OE