TeraFlex JK: Alpine IR Long Arms and Long Arm Brackets (Not Included) provide complete alignment adjustability and dependability for maximum performance on JK Wrangler/Unlimited models with 3-6 Inch Lifts. Our innovative, maintenance-free IR Bushings provide unrestricted rotation and flex as well as excellent NVH damping to improve on- and off-road ride quality and performance.MUST be used with Long Arm Bracket Kit (# 1957000) - Not Included. Can be added to any existing suspension lift.Includes: Alpine IR Long Arm Pairs: Arm Pair - Front Upper (# 1315570) Arm Pair - Front Lower (# 1315580) Arm Pair - Rear Upper (# 1315590) Arm Pair - Rear Lower (# 1315600) Fitment: JK Wrangler (2-door) JK Wrangler Unlimited (4-door) Specs: Lift Height: 3-6 Inch Control Arm Specs: JK: Alpine IR Long Arm Pair - Front Upper (# 1315570): Tube Diameter & Wall: 42mm x 4mm Factory Length: 18-3/4 Inch Min. Length: 27-3/8 Inch Max. Length: 28-7/8 Inch Bolt - Axle: 12mm Bolt - Frame: 14mm IR Bushing - Axle: OEM IR Bushing - Frame: 611019 JK: Alpine IR Long Arm Pair - Front Lower (# 1315580): Tube Diameter & Wall: 50mm x 5mm Factory Length: 22-5/8 Inch Min. Length: 33-3/4 Inch Max. Length: 35-1/4 Inch Bolt - Both: 14mm IR Bushing - Both: 611015 JK: Alpine IR Long Arm Pair - Rear Upper (# 1315590): Tube Diameter & Wall: 42mm x 4mm Factory Length: 17-7/16 Inch Min. Length: 20 Inch Max. Length: 21-1/2 Inch Bolt - Both: 14mm IR Bushing - Both: 611016 JK: Alpine IR Long Arm Pair - Rear Lower (# 1315600): Tube Diameter & Wall: 50mm x 5mm Factory Length: 19-3/4 Inch Min. Length: 35-3/4 Inch Max. Length: 37-1/4 Inch Bolt - Both: 14mm IR Bushing - Both: 611015
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