Description
Product Overview
The rear brake line on a lifted JK Wrangler is often overlooked — until it fails. At 4-6 inches of lift, the factory rear center drop line stretches tight at full droop, risking catastrophic failure. The iFJF Stainless Steel Rear Brake Line (replaces #89708) adds the necessary length while upgrading from rubber to braided stainless construction. DOT-approved and pressure-tested to 4,000 PSI, it completes your lifted JK's brake safety package.
Key Features
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DOT FMVSS-106 Approved & 4,000 PSI Tested — Each line individually pressure tested. Street-legal and trail-ready.
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Extended for 4-6" Lift — Engineered specifically for the rear center drop line on lifted JK Wranglers. No tension, no binding.
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Braided Stainless Steel Construction — Tough outer jacket resists rock strikes, mud abrasion, and road debris. Won't dry-rot or crack like factory rubber.
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PTFE Inner Liner — Teflon core is chemically inert and temperature-stable (-40°F to 400°F). No swelling, no degradation.
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Replace #89708 — Direct fit replacement for OEM rear brake line. Factory end fittings — no adapters needed.
Compatibility
| Make |
Model |
Years |
Lift Range |
| Jeep |
Wrangler JK |
2007-2018 |
4" - 6" |
| Jeep |
Wrangler JK Unlimited |
2007-2018 |
4" - 6" |
Specifications
| Specification |
Detail |
| Position |
Rear center drop line |
| OEM Reference |
#89708 |
| Outer Construction |
Braided stainless steel |
| Inner Core |
PTFE (Teflon) |
| Pressure Rating |
4,000 PSI |
| SKU |
FJ-TOOL23-03 |
Frequently Asked Questions
Q: Is this just the rear line?
A: Yes — rear center drop line only. For complete set (front + rear), see our full JK brake line kit.
Q: Can I use this with a 2.5" lift?
A: Designed for 4-6" lifts. On 2.5", the extra length may be excessive. Standard-length stainless replacement usually suffices.
Q: Does the rear line need extending for off-roading?
A: Yes — the rear axle droops significantly on rocks. A tight rear line can snap at fittings under tension.
Q: Full brake bleed needed?
A: Yes — opening the rear circuit introduces air. Use a pressure bleeder for best results.
Q: Compatible with aftermarket front lines?
A: Absolutely. Pairs with any DOT-approved front extended brake lines for consistent feel front-to-rear.
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