Front+Rear Dual Rate Coil Springs designed to great ride and improved performance across any terrain.
Front+Rear Gas Shocks (JSPEC or FOX 2.0 Adventure Series IFP) specifically valved for this suspension system for improved performance on and off-road.
Front Adjustable Track Bar and Rear Track Bar Bracket to correct axle positioning under vehicle.
Front Sway Bar Quicker Disconnects and Brake Line Brackets to allow for increased offroad articulation.
Front Control Arm Relocation Brackets to improve suspension geometry for improved handling.
HD Drag Link Flip Kit w/ Track Bar Bracket to improve steering angles for better handling.
Front+Rear Bump Stop Extensions to properly limit suspension up travel.
Increase the clearance and performance of your 4-Door Jeep Wrangler JK with a 3.5" lift J-Kontrol™ suspension system for exceptional stability on and off road. A step up from JKS J-Venture systems, J-Kontrol™ is a true bolt-on system that adds in front control arm correction brackets and a drag link flip kit to the J-Venture Kit's components including JSPEC dual-rate coil springs, custom-valved FOX Adventure Series shocks, an adjustable track bar, Quicker-Disconnects, and more. Take control with J-Kontrol. The supplied control arm brackets further enhance on-road handling by flattening out the control arm to more closely mimic factory geometry while correcting caster. The Drag Link Flip Kit flattens the steering angle to mimic factory geometry. J-Kontrol offers enhanced performance for daily driving, beach cruising, or regular trail use.
Increase the clearance and performance of your 4-Door Jeep Wrangler JK with a 3.5" lift J-Kontrol™ suspension system for exceptional handling and stability both on and off road. A step up from JKS J-Venture™ systems, J-Kontrol™ is a true bolt-on kit that adds front control arm correction brackets and a drag link flip kit to a J-Venture kit's list of components -- including JSPEC dual-rate coil springs, custom-valved FOX Performance Series shocks with remote reservoirs, an adjustable track bar, Quicker-Disconnect sway bar links, and more. The shock's remote reservoirs provide fade-free performance for a full day of off-road use. JKS supplies control arm brackets to further enhance on-road handling. The brackets flatten out your Jeep's control arm angles to more closely mimic factory geometry while correcting caster. The Drag Link Flip Kit flattens the steering angle to mimic factory geometry. J-Kontrol offers enhanced performance for daily driving, beach cruising, or regular trail use. Take control with J-Kontrol.
Improve the ground clearance and off road capability of your 4 Door Jeep Wrangler JK with the JKS J-Kontrol 3.5" suspension system. The J-Kontrol system retains your OE control arms, but steps up the rest of your suspension. J-Kontrol kits feature dual rate coil springs, adjustable front track bar, specially-valved gas shocks, sway bar Quicker Disconnects, and front control arm correction brackets as well as all other necessary hardware for a complete bolt-on installation. J-Kontrol system's front control arm correction brackets further enhance the on-road handling by flattening out the control arm to more closely mimic factory angles while correcting caster. With a matched combination of parts, J-Kontrol systems offer very solid performance without compromising daily-driver comfort. If you spend a good amount of time on the trails, take control with J-Kontrol.
All JKS products are protected by a limited lifetime warranty to ensure they are free from manufacturer defects in material and workmanship so you can go with confidence knowing your JKS parts are covered.
JKS Manufacturing applies warning labels either on our product(s), the packaging containing our product(s) regarding CA Prop 65. This warning is part of our effort to comply with the California Safe Drinking Water and Toxic Enforcement Act of 1986 (known as “Proposition 65”). The warning does not mean that our products will necessarily cause cancer, birth defects, or other reproductive harm. While we believe our products are not harmful when used as designed, and we rely on our suppliers to help with this effort, we also provide these warnings to comply with Proposition 65.
What is California Proposition 65?
Proposition 65 is a far reaching law and applies to any company that operates in California, sells products in California, or manufactures products that may be sold in or brought into California. Proposition 65 requires warnings to accompany any product that contains or may contain any of the chemicals appearing on the list administered by California’s Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The current list can be found here: https://oehha.ca.gov/proposition-65/proposition-65-list
What This Means To You
While the proposition was created to protect drinking water sources from chemical contamination, the scope of the law has expanded over the years. It now includes over 900 chemicals and also pertains to (but is not limited to) exposure through touch, inhalation, ingestion, or skin contact.
The Prop 65 warning can now be found on products that may contain a small amount of over 900 chemicals or ingredients that the OEHHA lists as a carcinogen or reproductive toxicant. This includes compounds that are used in everyday life like vinyl, coatings, plastics, and much more.
Why has JKS Manufacturing decided to provide a warning?
Proposition 65 imposes strict penalties for noncompliance. While California establishes “safe harbor numbers” for listed chemicals, the costs of individually testing products that JKS Manufacturing sells and distributes is prohibitive (particularly when the list of chemicals is so expansive and subject to change on an annual basis).
As a result of the steep penalties and because there is no penalty for providing an unnecessary warning, JKS Manufacturing (like some other companies doing business in California) decided to provide the Proposition 65 notice out of an abundance of caution.
IFP design eliminates oil aeration Valved specifically for JSPEC systems. Direct bolt-in replacement.
Fox Performance Series IFP Shocks
The 2.0 Performance Series IFP shock has a predicable ride quality capable of handling the roughest road conditions.
Shock absorbers are an important part of your Jeep’s suspension system. JKS offers a range of custom-valved shocks to fit your budget and performance needs. JSPEC Series gas shocks feature affordable twin-tube design with custom valving for improved handling and ride quality on and off-road. Ride quality is tuned to work with large diameter all-terrain tires. For more aggressive off-road performance, step up to optional FOX shock absorbers. They feature IFP technology, aluminum bodies, heavy duty shafts and superior monotube valving for a better driving experience regardless of terrain.
Choose your Coils?
PICKING THE RIGHT COIL SPRINGS
JKS J-Rated Suspension Systems feature custom wound, progressive rate coil springs. That means the spring rate increases as the spring is compressed. You and your Jeep enjoy a plush ride during low load driving scenarios such as highway cruising with increased performance as each spring compresses. If you carry a significant amount of extra gear in your Jeep, some J-Rated suspension systems are available with optional high-rate coil springs to support the additional weight.