JK: Alpine IR Control Arm Kit - Rear Upper (2-4" Lift)

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  • Regular price $515.99

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TeraFlex JK: Alpine IR Control Arms provide complete alignment adjustability for maximum performance on JK Wrangler/Unlimited models with 2-4" lifts. Uses factory control arm brackets. Includes our innovative IR (Independent Rotation) Bushings. Can be added to any existing suspension lift.


• JK Wrangler (2-door)
• JK Wrangler Unlimited (4-door)

• 2-4" Lift

Control Arm Specs:

• Tube Diameter & Wall: 1-5/8" x 0.157" (42mm x 4mm)
• Factory Length = 17-7/16"
• Min. Length = 17-5/8"
• Max. Length = 18-7/8"
• Both Ends = 9/16" (14mm) Bolt
• Thread = 1-1/4"-12 UNF


Alpine IR Control Arms - Adjustable:
• Driver Rear Upper (# XXXXXXX)
• Passenger Rear Upper (# XXXXXXX)

JK Alpine IR Short Control Arms:

• Adjustable Alpine IR Control Arms balance front caster angle and pinion angles as well as optimize rear pinion angle and tune anti-squat geometry for proper suspension alignment on 2-4" lift kits
• Alpine IR Control Arms are constructed from durable 42mm x 4mm wall DOM tube for maximum strength
• Bolts to the factory control arm mounting brackets

JK Alpine IR [Long] Control Arms:

• Re-centers axles in the wheel well for proper suspension movement. Can also be used to increase wheelbase
• Full range of movement will not restrict articulation or flex off-road
• Innovative IR Bushings provide unrestricted rotation and flex as well as excellent NVH damping
• Maintenance-free IR Bushings improve on- and off-road ride quality and performance
• Zero maintenance forged threaded joints for smooth quiet flex
• Premium black e-dipped coating on tube and forged rod end housing provides superior durability and corrosion resistance
• Anodized 6061-T6 aluminum clamp collar to secure rod end after length adjustment
• TeraFlex Lifetime Warranty against defects


• Alignment required.

Install Time: 2 Hours


Alpine IR Long Control Arms - Adjustable:

• 8-Arm Kit (# 1415611)

• Front Upper (# 1415570) - pair
• Front Lower (# 1415580) - pair
• Rear Upper (# 1415590) - pair
• Rear Lower (# 1415600) - pair

• IR Bushing Replacement Kit - 8 Short Arms (# 1952700)