TeraFlex Alpine IR Short Lower Control Arm Kit (2"-4" Lift) for 2007-2018 Jeep Wrangler JK
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Fits the same truck
Features
- IR lower short arms: Front lower or rear lower kit for the JK.
- No welding: Bolts to the factory control arm brackets, per TeraFlex.
- Independent Rotation bushings: Free-rotating inner sleeve for flex without bind, as TeraFlex describes it.
- DOM tube: 42mm x 4mm wall drawn-over-mandrel tube.
- 2"-4" lift range: Adjust to the lift and re-center the axle.
- Maintenance-free: TeraFlex says the IR bushings need no upkeep.
Description & Fitment
For the lower control arm positions on a 2-4" lifted 2007-2018 Jeep Wrangler JK, TeraFlex sells Alpine IR Short Control Arm Kits as a front lower kit (1415580) or rear lower kit (1415600). Built from 42mm x 4mm wall DOM tube with IR (Independent Rotation) bushings, the arms adjust in length and bolt to the factory brackets, no welding needed. Plan on an alignment after install.
Fitment & Compatibility
| Years | Model | Bed | Notes |
|---|---|---|---|
| 2007-2018 | Wrangler | JK; 2"-4" lift |
Check your Jeep: Wrangler JK or JK Unlimited, 2007-2018; 2"-4" lift.
Not for: JL or JT models; lifts over 4". Upper IR short arms: 1415570 / 1415590.
About TeraFlex
TeraFlex describes itself as a Jeep company at heart, started and staffed by people who drive them. It designs, engineers and builds suspension systems, shocks, axles and performance parts, with the Wrangler and Gladiator at the center of the range.
The company traces its roots to the 1950s and MEPCO (Military Equipment Parts Company), an early supplier of Jeep parts. TeraFlex Manufacturing followed in 1996 to build heavy-duty suspension for the TJ Wrangler, and today's catalog runs from full lift systems and the Falcon shock line to axles, steering and armor.
Authorized TeraFlex dealer. Prestige Truck is an authorized TeraFlex dealer, so what we sell is new and genuine TeraFlex. In TeraFlex's words, its limited warranty extends "only to the consumer who originally purchased the product," so keep your receipt with your build records.
Frequently Asked Questions
Which part number is which?
1415580 is the front lower kit and 1415600 the rear lower kit.
Will they work with my existing lift?
Yes, if it is in the 2"-4" range. They bolt to the factory brackets.
Do I need an alignment?
Yes.
What warranty does TeraFlex give?
TeraFlex covers its control arms, IR bushings, coil springs, bump stops and track bars for life against defects in materials and workmanship. Non-IR control arm and track bar bushings carry 1 year and finishes 90 days. For a claim, contact us with your order details.
How quickly does it ship?
Shipping is free to the lower 48 states, and most orders arrive within 1-5 business days. We email your tracking number as soon as it ships.
Can you confirm it's right for my Jeep before I order?
Yes. Contact us with your VIN or year, model and trim, plus your current lift, and we'll check it against TeraFlex's fitment information before it ships.
Installation
Here's the short version. Follow TeraFlex's install sheet (below) for your Jeep's exact steps and torque values.
- Raise and support the Jeep at the factory service manual points and remove the wheels; never remove more than 2 arms at a time, and keep any cam washers for reuse.
- Front lowers: unbolt the stock arm (21mm), set the Alpine arm to 23 1/8", fit the fixed end at the frame with the decal out and the adjustable end at the axle (cam bolts full forward or cam eliminator washers), bolts finger tight.
- Front uppers: free any wiring, remove both arms (21mm), set the Alpine arms to 18 7/8", fit the adjustable end at the frame with the decal out, bolts finger tight, and reattach the wiring.
- Rear lowers: support the pinion, remove both arms (21mm), set the Alpine arms to 20 1/8" (2-door) or 20 1/2" (4-door), clamp bolts 30 ft-lbs, fit with the fixed end at the frame; rear uppers (18mm): set to 18 5/16" (2-door) or 18 1/2" (4-door), fixed end at the frame, decal out (p6).
- Refit the wheels, lower the Jeep and, at ride height (arms with Alpine IR bushings may be torqued in the air), torque front lower axle bolts to 117 ft-lbs, lower frame bolts and rear uppers to 125 ft-lbs, front uppers to 75 ft-lbs, then the clamp bolts evenly to 30 ft-lbs (p4).
- Have a full 4-wheel alignment done and re-torque all hardware after 500 miles.
Stuck on a step?
Specifications
| Brand | TeraFlex |
|---|---|
| Product Type | Short control arm kit, lower (IR) |
| Lift Range | 2"-4" |
| Tube | 42mm x 4mm wall DOM |
| Bushings | IR (Independent Rotation) |
| Mounting | Factory control arm brackets |
| Alignment | Required |
| Variants | 1415580 Front Lower / 1415600 Rear Lower |
| Part number | 1415580 |
| UPC | 843885050544 |
| Part # | Position | UPC |
|---|---|---|
| 1415580 | Front Lower | 843885050544 |
| 1415600 | Rear Lower | 843885050568 |
Warranty, shipping & returns
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Warranty
TeraFlex covers the control arms, IR bushings, coil springs, bump stops, track bars and sway bar parts in these systems for life against defects in materials and workmanship. Alpine control arm and track bar bushings other than IR carry 1 year, and paint and powder coat finishes 90 days (defects only).- TeraFlex extends its limited warranty only to the consumer who first bought the product, and only on the vehicle the part was first installed on. It does not pass to a later owner.
- Coverage starts on the purchase date and does not restart if a part is repaired or replaced.
- For a covered defect, TeraFlex will either repair or replace the product (or the faulty part) free of charge or refund the purchase price, at its discretion, and it pays the freight to send a repaired or replacement part back to you.
- Not covered: damage from transportation, storage, improper use, skipped instructions or preventive maintenance, modifications, unauthorized repair, normal wear and tear, product finish, improper installation or maintenance, racing or competition, or accidents, abuse and neglect. Improper installation, poor maintenance, racing or competition use, and neglect or abuse void the warranty.
- Paint and powder coat finishes carry 90 days of defect coverage only, not wear from use.
- Claims: contact us first. Keep your proof of purchase or original invoice; removing the part from the vehicle and the inbound shipping are the owner's responsibility.
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Free shipping
Ships free to the lower 48 states, with no minimum order.- Order by 5 PM ET on a business day and it starts processing the same day.
- Most orders arrive within 1-5 business days.
- We email your tracking number as soon as it ships.
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Inspect on delivery
A lift system arrives in several boxes. Match every box and hardware pack to the part lists in the TeraFlex instructions before you start, and contact us right away about anything missing or damaged. Check it as soon as it arrives.- Look for crushed ends, punctures or tears in the carton.
- If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
- Open the box and check the parts against the parts list before you install.
- Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.
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30-day returns
Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.- Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
- Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
- Changed your mind: you pay return shipping. No restocking fee.
- Refunds go back to your original payment method within 7 business days of approval. See our returns policy.