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Jeep JK LS Engine Swaps 2007-2018

Jeep JK Wrangler LS Swap 2007-2011 : 2012-2018


We offer a few different options for installing a GM LS based engine into your Jeep JK.


DIY: Do it yourself conversion components. You purchase the parts needed and do the swap in your garage at your own pace or until you run out of beer. 


DIFM: Do it for me. We do the install here in house and hand you the keys your LS powered JK

Contact us for pricing or to schedule


Repower package: We ship you a fully completed GM powertrain with our conversion harness fully installed and programed. All you have to do is weld on the mounts drop in the powertrain and hook up the wires. Some other assembly is required but this is an excellent way to skip all the hassle of locating the powertrain and proper components.



There are 2 basic styles of engines that we support. The first is what is called a GEN3. This is an older LS based truck engine 4.8, 5.3 and 6.0  we are looking for 2003 - 2006 Drive by wire. These engines have earlier computers that don't communicate on the CANbus. We offer conversion components for these engines but don't offer the level of support that comes with a GEN4 engine conversion.  2007-2011 only.   Contact us directly for GEN3 components


The Second and more desirable option would be a GEN4 engine. These would be made from 2007 - 2015 and could have been used in anything from a truck to a Camaro. This would also include the new GM crate engines. This option is better as these engines are CANbus compliant and we offer full support.


GEN3 engines are as follows


Gen3 conversions use a 02-06 GM LS based DBW drive by wire engine. 

Look for LM7, L33 and L59 engines. 24X


LM7 5.3L vin code “T” cast iron block and makes around 285-295 HP & 320lb-ft of torque


L59 5.3L vin code “Z” is a flex fuel version of the LM7 and makes around the same power


L33 5.3L vin code “B” is an aluminum block version of the LM7, and was referred to as the Vortec 5300 HO in marketing materials. However it should be noted that the L33 uses a flat top piston from the 4.8L instead of the standard dish piston found in the LM7. It also uses 799 cylinder heads, which are identical to the 243 casting found on the LS6 and LS2 .This combination increased the compression from 9.5:1 to 10.0:1. Also the L33 had a specific camshaft not shared with any other engine. As a result, power increased by 15 hp, to 310 hp and 335 lb·ft. It was only available on extended cab 4WD pickup trucks.


With the Gen3 swaps we use a GM 4L60E or 4L65E 4 speed automatic transmission adapted to the stock Jeep JK transfer case 




GEN4 engines are as follows


Gen4 conversions use a 07-13 GM LS based engine. All are DBW drive by wire. They can be had in either cast iron or aluminum blocks and sizes ranging from 5.3L - 6.2L 58X



5.3 Engines are a great choice and offer the most budget friendly conversions due to the availibity and cost. 

The 5.3 makes great power for a average built 4 door JK. You can pull a small trailer and have plenty of power for the highway.

If you have a "heavy" JK or larger than 37" tires we recomend stepping up to a 6.0 or 6.2.


LH6 5.3L vin code “M” is an aluminum block engine producing 315HP and 338lb ft of torque.


LY5 5.3L vin code “J” is a cast iron block engine producing 320HP and 340lb ft of torque.


LMG 5.3L vin code “O” is a flex fuel version of the LY5 making the same power.


LC9 5.3L vin code “3or 7: is an aluminum block engine producing 320HP and 335lb ft or torque. 





Most of these  6.0L engines come from HD trucks and are extremely durable.

All 6.0L truck engines will run on 87 octane fuel and work well in extremely cold climates.  

Gm bult a ton of these so there are some good deals to be had.

These engine will have plenty of power and torque for any JK build no matter the tire size or weight.


L76 6.0. is an aluminum block based on the LS2 and produces 348HP and 376lb ft or torque


L98 6.0 is a modified versions of the L76 and is used in the Holdens it produces 362HP and 391lb ft.


LY6 6.0 is a cast iron truck engine and has VVT. it produces 361HP and 385lb ft of torque.


L96 6.0 is a cast iron truck engine has VVT and flex fuel. 


* Most 6.0 truck engines came with a 6L90E transmission. Some had a E38 ECU and others had a E67 ECU. 





All 6.2 truck engines are aluminum. All are based on the LS3 but have a taller intake for better low end power and torque.

These engines are an excellent choice for any Jeep JK build. They will idle at 550rpm have great low end power and breeze down the highway without struggeling. 

We recomend looking for 2010 - 2013 


L92 6.2L vin code “ “ is an aluminum block engine with VVT (variable valve timing) producing 403HP and 417lb ft of torque.


L9H 6.2L vin code “ “ is a flex fuel version of the L92 making the same power


L94 6.2L vin code “ “ is the same as a L9H but with added AFM (active fuel management)




6.2 Camaro

The LS3 and L99 are both excelent choices. These engines will have the lower "car" intake and look excellent when paired with a set of corvette style engine covers.

These engines also idle at 550rpm with great power and driveability.  These engine are also the most desirable for hot rod swaps so prices are usually inflated. If you find a good deal, snag it.


LS3 6.2L was introduced as the Corvette's new base engine for the 2008 model year. It produces 430 bhp at 5900 rpm and 424 lb·ft at 4600 rpm. Look for engines from a 2010 - 2015 camaro with a manual transmission


L99 6.2L is derived from the LS3 with reduced output but adds AFM  (Active Fuel Management) and VVT (variable valve timing). Look for engines from a 2010- 2015 camaro with a Auto transmission.




LS3 Crate engines:


LS3 crate engines come semi complete from oil pan to the ignition system. It also includes the "car" style intake manifold assembly with injectors and throttle body, exhaust manifolds, corvette water pump & balancer and 14-inch automatic-transmission flexplate. You will still need to source an accessory drive i.e.: alternator, power steering, AC and brackets. We typically try to use a modified 2010 camaro accessory drive or modified CTSV drive on this setup. 


430HP 6.2L 

480HP 6.2L

525HP 6.2L 




Still have questions? Visit our FAQ 


Install Instructions can be found HERE


Check out our video HERE


With the Gen4 engine swaps we use a GM 6l80E 6 speed automatic transmission. Click here for 6L80E info


Its very important to match the engine computer to the transmission computer. Click here for info


Converting from a manual to an automatic you will need to source the stock Jeep auto shifter components click here for more info


Our kit supports manual to auto conversions with the factory dash working as designed.


Do you run a big winch or big nasty bumper? Click here to read about airflow 



If your ready to purchase or have questions give us a call at the shop 205-631-8225