So you’ve decided to unlock the true potential of your 5.7 Hemi by installing an LML delete kit. Excellent choice. That restrictive emissions equipment is holding your engine back, robbing you of power and performance. Once you complete this mod, you’ll feel the difference immediately.
Get ready to experience what your Hemi is truly capable of producing. No more limp mode, no more derating. Just raw Hemi power whenever you want it. You’ll wonder how you ever drove it stock.
This guide will walk you through the entire LML delete installation process step-by-step. We’ll cover removing the emissions components, installing the delete pipes, tuning the ECU, and everything in between. By the end, your Hemi will be free of restrictions and making power like never before. You’ll be grinning from ear to ear the first time you put your foot down.
Let’s get started. The open road is calling your name, and there’s no time to waste. The Hemi you’ve always wanted is within your grasp. Unleash the beast!
What Is an LML Delete Kit?
An LML delete kit removes the exhaust gas recirculation (EGR) system and diesel oxidation catalyst (DOC) on your Dodge Ram
with the 6.7L Cummins engine.###
By deleting the EGR and DOC, you’ll increase horsepower and torque. The EGR reroutes exhaust gasses back into the engine, reducing emissions but also reducing power. The DOC is an emissions control device that cleans up the exhaust but also restricts flow.
Removing these components is easy with an LML delete kit. You simply unplug the EGR valve and DOC, then install block-off plates in their place. This prevents exhaust from entering the engine and improves flow out of the tailpipe.
With the EGR and DOC deleted, you’ll need to tune your truck’s ECU to disable the emissions controls and optimize performance. An LML delete kit typically includes custom tuning software to maximize your truck’s potential.
You can expect to gain 35-100 horsepower and 70-200 lb-ft of torque, depending on the tune. Your truck will also run cooler without the EGR introducing hot exhaust gasses.
While an LML delete kit improves performance, it does make your vehicle emissions non-compliant. Check your local laws before installing one. If emissions compliance is required in your area, an EGR and DOC delete kit may not be for you. But if you want to uncork your Cummins, an LML delete kit is a great place to start.
Benefits of Installing an LML Delete Kit on Your 5.7 Hemi
Installing an LML delete kit on your 5.7 Hemi headers is one of the best modifications you can make. Here are a few of the major benefits you’ll gain:
By removing the LML components – like the EGR valve, DPF filter, and catalytic converter – you’ll free up exhaust flow and increase power. Many owners report gains of 30-50 horsepower. The improved airflow also means better throttle response, so your Hemi will feel more alive.
Longer Engine Life
The LML system recirculates exhaust gasses, which contain contaminants that can build up in your engine over time. By removing these components, you prevent that buildup and reduce strain on your Hemi. The end result is an engine that will likely last longer.
With the LML system removed, there are fewer parts that can fail or need replacement. No more worrying about clogged DPF filters or faulty EGR valves. You’ll save money on repairs and have fewer trips to the shop.
Improved Fuel Economy
Contrary to popular belief, deleting the LML system often improves your miles per gallon. How? By reducing backpressure, your engine doesn’t have to work as hard to push exhaust out. The end result is an engine that uses fuel more efficiently. Many owners report 1-3 mpg gains after installing an LML delete kit.
If you’re looking for more power, improved reliability, reduced costs, and better fuel efficiency from your 5.7L Hemi, deleting the LML system is one of the best ways to achieve all of those goals. Make sure you check your local laws regarding emissions before installing the kit. For many owners, the benefits of the LML delete far outweigh the downsides.
Step-by-Step Guide to Installing an LML Delete Kit
To install an LML delete kit on your 5.7 Hemi, follow these steps:
Gather the Necessary Tools
You’ll need basic hand tools like wrenches, sockets, allen wrenches along with a Dremel tool to cut the DPF pipe. Make sure you have safety gear like work gloves, eye protection and proper ventilation.
Locate the Diesel Particulate Filter
The DPF is located under the truck, behind the catalytic converter. You may need to raise the truck on jack stands to access it.
Cut Out the DPF
Use the Dremel tool to cut the DPF pipe on both sides of the filter. Be very careful, as the pipe and filter will be extremely hot if the truck was just running. Let the system cool completely before cutting.
Install the Delete Pipes
With the DPF cut out, you can now install the 4″ delete pipes in its place. Slide the pipes over the remaining exhaust pipe and clamp them in place. Tighten the clamps securely with a wrench.
Install the EGR Delete Plate
The EGR delete plate blocks exhaust gasses from entering the intake. Locate the EGR valve on the intake manifold and unbolt it. Bolt on the EGR delete plate in its place.
Flash the ECM
The final step is to have the truck’s ECM reflashed to disable the DPF and EGR systems. A performance shop can flash and tune the ECM for the deletes. New tunes will increase horsepower and torque, and may improve fuel economy.
With the DPF and EGR systems now deleted, your 5.7 Hemi will breathe better and make more power. Regularly check all connections and clamps to ensure there are no exhaust leaks. Your truck may require re-tuning if any major engine work is done in the future.
So there you have it, a step-by-step guide for installing an LML delete kit on your 5.7L Hemi Ram. With some basic tools and a free Saturday, you’ll be enjoying the throaty roar of that uncorked exhaust and feeling the surge of power from your newly unleashed engine. No more limp mode, no more regeneration cycles killing your momentum. Just pure Hemi power and performance. Your Ram will feel like a whole new beast, ready to tackle any adventure. The only downside is you may get addicted to mashing the throttle and hearing that rumble – but that’s not such a bad problem to have! Get out there and enjoy your new and improved Hemi. You’ve earned it.
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