JK Alpine IR Control Arms TeraFlex YouTube Teraflex 3.5 Alpine IR RT3 Short Arm Lift Kit for '18+ Jeep Wrangler TeraFlex Alpine Front Upper Control Arms 2 4" Lift For 07 18 Jeep TeraFlex Suspension & Parts ExtremeTerrain Teraflex Alpine CT3 Short Arm Suspension System for 18 24 Jeep Wrangler TeraFlex Alpine Adjustable Long arm Kit For '07 '18 Jeep Wrangler JK. TeraFlex JK: Alpine IR Short Arms provide complete alignment adjustability and dependability for maximum performance on JK Wrangler Unlimited models with 2 4 Inch Lifts. Bolts to the factory control arm mounting brackets. 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. Can be added to any existing suspension lift. Includes: Alpine IR Short Arms: Arm Front Upper Left (# 1141573) Arm Front Upper Right (# 1141572) Fitment: JK Wrangler (2 door) JK Wrangler Unlimited (4 door) Specs: Lift Height: 2 4 Inch Control Arm Specs: Tube Diameter & Wall: 42mm x 4mm Factory Length: 18 3 4 Inch Min. Length: 18 1 2 Inch Max. Length: 19 3 4 Inch Bolt Both: 12mm IR Bushing Axle: OEM IR Bushing Frame: 611017