RpmExtreme PREMIUM JEEP JK LS CONVERSION KIT

PREMIUM JEEP JK LS CONVERSION KIT

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Available Options

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Product Description

07-11 Jeep JK GEN4 LS Swap Premium DIY Kit

The ultimate DIY solution for swapping a GM GEN4 LS engine and 6L80/6L90 transmission into your 2007–2011 Jeep JK. Our premium conversion kit helps you transform your Jeep with the power and reliability of GM's LS GEN4 series engine and 6-speed automatic transmission. We've engineered a true plug-and-play experience with no harness send-ins, minimal wiring modifications, and factory-level integration.

How to Order

  • Year Selection: Choose Jeep 2007–2010 or 2011 (2011 kit includes our upgraded cruise/TAP shift switch).
  • Radiator Inlet: Right-hand inlet for (truck water pump) or left-hand inlet for (Camaro/LS3 water pump).
  • Pentastar PWM Fan: Upgrade to PWM for the best modern cooling solution.

What Makes Our Kit Different?

The big difference in our conversion kit compared to others is the advanced technology we incorporate. Your Jeep JK uses a CanBus system to communicate between components, and GM side uses their own CanBus system—but they don't speak the same language. Our exclusive EZ CanBus module bridges this gap, translating between both systems for seamless integration.

This technology allows us to send data back and forth between the Jeep and GM side without additional sensors or simulator modules. All the modules in the Jeep will receive translated signals directly from the GM engine, saving you time and money while providing more reliable operation by providing correct data for all jeep modules to refrence and use.

Premium Features & Technology

  • True CAN Bus Integration: Our exclusive EZ CanBus module is the bridge between the GM and Jeep systems, so all your Jeep computers receive correct data—gauges, PRNDL display, cruise control, remote start, and more operate as if factory-installed.
  • Plug-and-Play Harness: 100% brand new, pre-built harness. No core needed, no modifications to your old harness. Minimal wiring—just a few simple connections.
  • OEM-Level Functionality: PRNDL shows 1-6 gears during TAP shifts, full TAP shifting using the Jeep cruise switch, functioning cruise and check engine lights, factory remote start, and AC.
  • Clean Installation: Engine harness routes for a factory look (compatible with engine covers), while under-dash harness connects everything with no splicing or hacking.
  • GM TOW/HAUL Mode: Access through your O/D off button (factory Auto JKs only, 2007-2011).
  • Full Emissions Compatibility: All emissions components wired into the harness with GM VVT/AFM-DOD compatibility.

What's Included in the Premium DIY Kit?

Our premium kit includes everything you need to complete your conversion without fabrication or guesswork:

  • Complete Wiring Solution: Under-hood & under-dash conversion harness (engine/trans, integrated, plug-and-play), EZ CanBus module, and OBD2 Options flash cable.
  • Mounting Hardware: Weld-in motor mount brackets (frame side), transmission mount plates & shifter brackets (bolt-in, stock shifter compatible), and GM accelerator pedal bracket (bolt-in).
  • Drivetrain Components: Transfer case adapter & input shaft/seal (6L80/90 to Jeep 241J, non-Rubicon), direct-fit fuel line (engine to stock JK line), and GM EVAP kit (vent valve & fuel tank pressure sensor).
  • Cooling System: 52mm high-flow all-aluminum radiator that bolts into factory Jeep JK mounts (choose right or left inlet to match your engine layout), steam port fitting included, and coolant overflow reservoir.
  • Air & Climate Control: Composite air intake kit (reduces intake temps vs. aluminum) with MAF/breather mounts, clamps, and K&N filter (requires credit-card style MAF sensor GM 15865791), and AC hose kit that connects directly to Jeep JK evaporator and condenser, using stock Jeep switches and sensors (compatible with GM truck compressor and some aftermarket compressors).
  • Tuning & Support: Custom tuning device for GM ECU/TCM (includes hardware to read and save your calibration for custom tuning), comprehensive instruction book, and expert tech support.

Optional Upgrades

  • Pentastar High-Output PWM Cooling Fan: Modern cooling solution for optimal temperature management.
  • GM ECU (E38): We can supply the appropriate E38 computer for your specific application.
  • Enclosed Airbox: Enhanced filtration and intake protection.
  • Manual to Auto Conversion Kits: Available for manual transmission Jeeps.

Installation & Support

Our premium kit is designed for shops or customers with mechanical experience who want a complete solution without fabrication requirements. The harness features improved aesthetics and versatility, is easier to install, and offers premium quality and durability.

Full install instructions and videos are linked below. Our expert tech support is always available—email us before ordering with any questions.

DIY Kit Install Instructions
Transfer Case Input Shaft Instructions
Watch Our Install Video

Request GEN4 LS JK Swap Estimate

Click this to fill out an online form with your build information. We'll verify all the parts you plan on using will work well together and send you a full DIY KIT estimate with build notes.

CURRENT BUILD TIMES ARE 8-12 WEEKS