Welcome to our guide for the LML Duramax EGR delete!
The aim of this guide is to compare the best ways of removing the EGR valve and cooler, which are part of the factory emissions system on your Duramax.
Speaking of emissions, the EGR removal goes hand in hand with deleting the DPF, and a lot of lml owners go for installing both kits at the same time in order to eliminate both of the failure prone emissions systems at once.
It’s a great way to kickstart your truck’s performance and efficiency. Let’s take a look at some of the benefits.
Benefits of an EGR Delete
The main benefit of removing the EGR system is that hot and sooty exhaust gasses will no longer be fed back into your intake, which has always been a problem when dealing with diesel engine longevity and efficiency.
This translates into lower intake temps. Your turbo will spool up faster and heat up your exhaust less, which means lower EGT’s. Your coolant will also be able to recirculate much faster, which means lower coolant temps.
You can expect to see an increase of a few MPG and HP after blocking off or removing the EGR system.
Duramax LML EGR Delete Kit
When putting together the parts for your EGR delete, you’ll have to consider which route you want to take with the kind of kit that you get. Basically, there’s an easier way to remove the EGR that takes about 3-6 hours to install, or there’s the full delete option that takes a lot more work.
For most, the easier way is perfect to start with as it gives you almost all the benefits at a fraction of the install time. You can always add the rest of the parts needed for the full delete as you do other upgrades down the line.
At the bare minimum, when removing the EGR on the LML you’re going to need some blockoff plates, hoses for rerouting the coolant and a tuner to edit the ECM.
If you don’t already have a tuner, take a look at the best options for the LML.
Once you have a tuner, the only other parts you’ll need for the easier EGR delete option are the block off plates and coolant lines, which are often sold in kits like these:
EGR/Cooler Delete Kit Options
- XDP EGR Delete Kit – Duramax LML
Reviews say that this kit from XDP is top notch, the block off plates fit very well and everything goes together smoothly, as you would expect with a name brand quality kit like this.
- 2011-2015 GM 6.6L Duramax LML*
- Designed For Off-Road Use
- Decreases Internal Soot Build-Up
- MADE IN THE USA!
- CA Residents: Not legal for sale or use in California
The XDP LML EGR Delete XD167 for your 2011-2015 GM 6.6L Duramax LML is designed to remove the EGR system on your engine. Built for off-road use, the EGR Delete will increase performance and reliability while you're on the track! *Note: Aftermarket tuning required. This product will NOT fit on the 2015.5 models with 3/4" heater core plumbing on firewall. CA Residents: Not legal for sale or use in California on pollution controlled motor vehicles.
- LML EGR Delete Kit by Rudy’s Diesel Performance
This kit is sold and branded by Rudy’s Diesel Performance, however it looks to be a generic brand that quite a few companies are also selling. Looking at the reviews, the install seemed to go smoothly for the most part.
EGR Valve Cooler Delete Kit For 2011-2015 GMC Chevrolet 6.6L LML Duramax Diesel
Competition tested at over 700hp this EGR delete is a must have for your drag or sled pull truck. Every EGR delete kit is manufactured from 304 stainless steel and billet aluminum. This race kit completely replaces the entire EGR system and can be installed in 6-8 hours without removal of the intake manifold. Product Features: Quicker turbo spool with lower EGTs Fully pressure tested Faster recirculation of the coolant resulting in lower coolant temps ** RACE Tuning is Required ** **THIS WILL NOT WORK ON 2015.5 MODEL YEAR**
Click Here for directions on how to do the install for the block off plate and cooler removal.
If you’re doing it the easier way, you can skip the steps where you unbolt the downpipe and up-pipe. Instead, you simply install the up-pipe block off plate and keep the EGR portion of the up-pipe intact.
Full LML EGR Delete Kit
While the regular easier EGR delete is great for most people and will be sure to give excellent results, there are also those of us who are looking for a way to completely remove any unnecessary crapola from under our hoods.
This is where the full EGR delete kit parts package comes into play for the LML.
Be warned, doing it this this way requires a lot more work, but it’s the only way to go when you are trying to get the most out of your truck.
In addition to the block off plates, you’ll also want to get the following two parts in order to remove anything and everything associated with the EGR system.
High-Flow Intake Elbow Bridge
- Rudy’s Diesel Intake Elbow Bridge
The Rudy's Diesel LML Intake Bridge for 2011-2016 GM 6.6L Duramax diesel will increase off the line torque and horse power. Mandrel bent 3 inch aluminum tubing optimizes airflow after the throttle valve and heater grid. This part will retain the factory heater grid and throttle valve assembly and will not affect low temperature engine starts. Features: Bolt On Installation Mandrel Bent Aluminum Tubing Retains Factory Smog Equipment Increases Off The Line Torque and Horsepower Comes with Resonator Delete Block We can NOT ship this product to California.
EGR Delete Up-Pipe
- Rudy’s Diesel Up-Pipe for LML
Bolt On Passenger Side Up-Pipe w/ Gaskets For LB7 LLY LBZ LMM LML 6.6L Duramax
If you are looking for a replacement passenger side up-pipe due to a blown out bellow or you've deleted the EGR system on your truck, Rudy's new up-pipe is your solution. With high temperature coating, high performance bellow and laser cut flanges, it's guaranteed to fit perfectly and last forever! This passenger side up-pipe includes a new set of gaskets! Features: High performance bellow Laser cut flanges Drop EGT's Add horsepower Direct bolt-on installation Includes gaskets *INSTALLING THIS WILL REQUIRE A RACE TUNER WHEN USED TO DELETE THE EGR SYSTEM*
More performance parts to consider
If you’re tearing your truck down far enough to do the full delete, there are some parts in the way that would also be good candidates for upgrading while you’re in there.
LML Duramax Down Pipe
- Fits LML Duramax. (non 3 bolt)
- 409 Stainless Steel Mandrel bent tubing with thermal coat & heat wrapp.
- Reduced EGT's and improved throttle response.
- Maximum air flow.
- Will not affect emmisions.
Turbo direct pipe replacement that mounts between your factory turbo and exhaust system. Featuring full 16 gauge mandrel bent tubing for maximum flow, and an extremely durable high temp ceramic coating, this pipe deepens the sound of your Duramax while lowering EGT's and providing quicker throttle response.
LML Duramax Cold Air Intake
aFe Power 51-74006-1 Momentum HD Performance Intake System (Dry, 3-Layer Filter)
- Outflows the factory intake by up to 52%. Produces an additional 22 horsepower and 57 lbs. x ft. torque max gains
- 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience
- High quality one-piece housing with auxiliary air scoop
- Unique (Patent Pending) filter-to-housing interface for easy installation
- This product is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles
Unique One-Piece High Quality Housing w/ Auxiliary Scoop: The smooth one-piece high quality sealed housing with auxiliary air scoop is used to eliminate the use of multiple-piece housings and ensure the coolest air intake charge available. A large, clear sight window is used for a hassle-free filter inspection and an aggressive style. A urethane plug is also included if you wish to completely seal the air box. High Quality Tube: This system uses a high quality plastic CAD designed, dyno-tuned, roto-mold intake tube to achieve maximum power gains while maintaining a perfect fit. Huge 3-Layer Performance Air Filter: The Momentum HD intake is designed around a massive 1,000cfm performance 360 degree radial flow air filter with 3-layers of progressive finer porosity synthetic media providing maximum convenience. The unique air filter to housing interface (patent pending) allows for maximum filter size which increases the available air volume while simplifying the installation process. The air filter is wrapped in reinforced metal providing maximum strength to prevent filter collapse. Premium Hardware: Premium stainless steel T-bolt clamps and a reinforced silicone coupler are used...
Hopefully this guide has given you a better idea of how to remove the EGR system on your LML.
If you have any questions or comments, be sure to drop us a line below!
- Rudy’s Diesel Up-Pipe for LML