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Dial In 3.5 Inches of Front Lift Without Sacrificing Ride Quality
The RK07987P is Rock Krawler's triple rate front coil spring built specifically for the 392 Hemi V8 Jeep Wrangler JLU Rubicon. Sold as a pair of springs only, the RK07987P raises the front of the Jeep approximately 3.5 inches while keeping the on-road comfort that Rock Krawler's triple rate design is known for. This spring is engineered for the added weight and unique factory geometry of the 392 platform rather than being a generic JL coil.
Key Features
- Triple rate spring design blends multiple spring rates in one coil for better comfort and control
- RK07987P raises the front of the Rubicon 392 approximately 3.5 inches
- Coil height of 21.25 inches matches the 3.5 inch lift application
- Black powder coat finish protects against corrosion and trail debris
- Engineered specifically for the heavier 392 Hemi V8 drivetrain and factory ride height
- Painless, drill-free installation into the factory front spring buckets
- Pairs with Rock Krawler correction pads to reduce factory spring bow
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2021-2025 | Jeep | Wrangler JLU | Rubicon 392 |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RK07987P |
| Brand | Rock Krawler |
| Position | Front |
| Lift Height | 3.5 inches |
| Coil Height | 21.25 inches |
| Spring Type | Triple rate |
| Finish | Black powder coat |
| Warranty | 5 year manufacturer's defect warranty |
What's Included
- 2 x RK07987P Front Coil Springs
About Rock Krawler
Rock Krawler Suspension has spent decades developing suspension systems for Jeep enthusiasts, refining spring rates and geometry through real trail testing. The RK07987P reflects that engineering focus, tuned specifically around the demands of the 392 Hemi V8 Wrangler platform.
Related Parts on Our Site
- Rock Krawler 2018+ Jeep Wrangler JL 2DR / JLU 4DR Front Upper Adventure Series Control Arms
- Rock Krawler 2018+ Jeep Wrangler JL 2DR / JLU 4DR Front Adjustable Track Bar
FAQ
What is the RK07987P?The RK07987P is a Rock Krawler triple rate front coil spring designed for the 2021 and newer Jeep Wrangler JLU Rubicon 392. It provides approximately 3.5 inches of front lift and is sold as a pair of springs only.
Does the RK07987P fit the standard V6 Wrangler JLU?No, the RK07987P is engineered specifically for the 392 Hemi V8 Rubicon and its unique ride height and weight distribution, so it is not intended for the standard V6 JLU.
How much lift does the RK07987P provide?The RK07987P provides approximately 3.5 inches of front lift when installed on a Rubicon 392 in a standard build configuration.
Does the RK07987P come with shocks or control arms?No, the RK07987P is springs only. Shocks, control arms, and other suspension components are sold separately.
What does triple rate spring mean?A triple rate spring blends three different spring rates into a single coil, improving small bump comfort while still supporting heavier loads and off-road impacts.
Will the RK07987P affect my Jeep's ride quality on the street?The triple rate design of the RK07987P is intended to preserve a comfortable street ride while still providing the extra travel and clearance needed off-road.
Does installing the RK07987P require any cutting or drilling?No, the RK07987P installs into the factory front spring buckets without cutting, drilling, or permanent modification.
What warranty comes with the RK07987P coil springs?The RK07987P is covered by a 5 year warranty against manufacturer's defects, and coils must be uninstalled to be eligible for a defect return.
Can the RK07987P be used with a full size spare and winch bumper?Yes, the stated lift height for the RK07987P assumes a standard build with a front bumper and winch and a rear bumper with full size spare.
Install Instructions
- Raise and safely support the front of the Jeep Wrangler JLU 392 on a lift or jack stands.
- Remove the front wheels and disconnect the sway bar links and any components blocking spring access.
- Support the front axle with a jack and slowly lower it to relieve spring tension.
- Remove the factory front coil springs from the spring buckets.
- Install Rock Krawler correction pads if included to minimize spring bow.
- Set the RK07987P coil spring into the factory spring bucket, ensuring proper seating.
- Raise the axle back into position and reconnect the sway bar links and any removed components.
- Lower the Jeep, cycle the suspension, and check ride height before scheduling an alignment.
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