Diesel Truck Owners Are Getting Ripped Off by Emissions Rules — And No One Seems to Care
Related Posts
Best Tuner for 6.7 Cummins: Protect Your Truck and Unlock Real Power
Ask any diesel guy what makes the 6.7 Cummins special and the answer comes back the same, that block will run past 300,000 miles without blinking. What nobody mentions is the stuff hanging off it and the gearbox sitting behind it, both of which decide whether your tuner delivers power or hands you a repair bill. A wrong choice here can slip a 68RFE into an early grave, or leave you staring at a device that refuses to talk to your truck at all. Below, we will be answering your most asked questions about the tuners that hold up on a 6.7 Cummins, the transmission and security headaches most sellers stay quiet about, and what suits your truck and your year, so you can make an informed decision before you buy. The Two Things That Trip Up Cummins Owners Before any product talk, understand the two problems specific to this platform. Miss either one and the best tuner in the world will not help you. The first is the transmission. The 6.7 Cummins puts down serious torque, and the factory 68RFE automatic is the weak link in the chain. Add a big power tune with no transmission management and you are asking the clutches to hold more than they were built for. They slip, they heat, they burn. A good tuner does not just add engine power, it manages torque and shift pressure so the transmission survives the extra grunt. The second is truck security. Ram started locking these trucks down, and it changes what you can install. 2018 and newer trucks have a Security Gateway that blocks the OBD-II port. Plug a tuner in without a bypass cable and it will not connect. 2019 and newer trucks add encrypted computers that often need an unlock or a swapped module to tune at all. Know your year before you buy anything, because the answer to "which tuner" depends entirely on where your truck falls on that timeline. Stock or Deleted: Which Tuner Setup You Actually Need Not every Cummins owner is deleting. Plenty just want more power and better towing manners on an otherwise stock truck, and the tuner you pick depends on which camp you are in. On a stock truck with the emissions intact, you want an emissions-compliant tune that leaves the DPF, EGR, and DEF working. This still sharpens throttle response, adds usable power, and helps on grades, but it keeps the factory hardware in play. It is the route for owners who tow and want more grunt without touching the emissions system. A deleted setup is a different animal. Once the DPF, EGR, and DEF hardware comes off, the tune has to disable the monitoring for those parts or the truck throws codes and drops into limp mode. This is where the bigger gains live, and it is what most of the tuners in this guide are built around. The practical takeaway is simple. Decide whether you are deleting before you buy, because a tuner set up for a deleted truck is not what you want on a stock one, and a compliant stock tune will not carry a deleted truck. If a delete is anywhere in your plans, buy for that from the start so you are not paying twice. The Best Tuners for a 6.7 Cummins A handful of tuners have earned their reputation on this engine. Each fits a different owner and a different goal. H&S Mini Maxx The Mini Maxx is the plug-and-play veteran of the Cummins world. It is a dash-mounted screen loaded with tunes, it clears codes, and it doubles as a gauge display so you can watch boost and exhaust temps while you work the truck. On older trucks it is close to plug it in and go. It is the pick for owners who want a proven, all-in-one box without fussing with a laptop or a phone. Just confirm the version matches your year, since the older hardware does not cover the newest trucks. EZ Lynk Auto Agent The EZ Lynk is the connected option and the one most delete kits are built around. It plugs into the OBD-II port and links to your phone, so a professional tuner can send custom files and updates straight to the app with no computer involved. The remote support is the real draw. A good tuner can read your truck's data from anywhere and push a corrected file to your phone. It is the best fit for owners who want custom tuning tailored to their exact truck plus easy monitoring. This is the tuner Diesel Patriots includes in our Cummins delete kits, so the tuning is handled for you from the start. EFI Live AutoCal EFI Live is the choice when you care how the truck drives, not just how hard it pulls. Its strength is transmission tuning. If your 68RFE shifts hard or hunts for gears, a good EFI Live file smooths it out and manages the clutch pressure to handle the added torque. It is a delivery tool for a custom tune, so the value lives in the tuner writing your file. It suits owners chasing a dialed, drivable setup and anyone towing heavy who wants shift points and exhaust braking done right. MM3 The MM3 came into its own when the 2019 and newer trucks arrived with heavy encryption. It is a fast touchscreen with a strong track record of unlocking the newer models that stump older tuners. Switching power levels takes seconds. It is the answer for late-model owners who want a physical screen instead of a phone and need a device that can handle the newer security. Match the Tuner to Your Truck Year This is where the transmission and security notes turn into a buying decision. Find your year, then browse the Ram Cummins delete kits built to match. Year range What to know Setup notes 2010 to 2012 Easiest to tune, widest support Plug-and-play friendly 2013 to 2018 Broad tuner support, 2018 needs a bypass Bypass cable required on 2018 2019 to 2021 Encrypted computer, needs unlock path Bypass plus unlock territory 2022 to 2024 Newest security, transmission matters Confirm your transmission fitment 2010 to 2018 Cummins These are the friendly years. Tuner support runs deep, gains are strong, and the setup is straightforward. The one wrinkle is 2018, when Ram added the Security Gateway. A 2018 truck needs a bypass cable to let the tuner talk to the ECM, which is why a proper kit includes that cable rather than leaving you to hunt for one. Our 2013 to 2018 Cummins delete bundle ships with the bypass for 2018 trucks already in the box. 2019 to 2024 Cummins The newer trucks are where it pays to know what you are buying. Encrypted computers mean tuning often takes an unlock or the right connected device, and the security only got tighter through 2024. Transmission fitment matters more here too, since not every kit fits every gearbox on these trucks. Confirm your exact year and transmission, then look at the kit built for your range, whether that is the 2019 to 2021 bundle or the 2022 to 2024 bundle. Buy blind on these years and you risk a device that will not connect. Installing Your Tuner and Delete Setup The good news is that most 6.7 Cummins owners can handle this in their own garage. A full delete and tune usually runs about 4 to 8 hours depending on how handy you are, and the tuner itself is largely plug-and-play once the hardware is on. Every kit ships with step-by-step instructions, and support is a call away if you get stuck. Here is the shape of the job so nothing surprises you. Park level, let the engine cool, and disconnect the battery before you start. Get the truck safely up on jack stands so you have clean access to the exhaust and undercarriage. Remove the DPF and exhaust section, disconnecting the sensor wiring and unbolting the clamps and hangers before lowering the factory unit out. Install the delete pipe or full exhaust, reusing the factory hangers and keeping clearance from the driveshaft and frame. Handle the EGR, draining the coolant first, then removing the cooler and valve and fitting the block-off plates with the coolant bypass routed per the instructions. If your truck is a 2018 or newer, plug in the bypass cable so the tuner can reach the ECM. This is the step people forget, and without it the device will not connect. Load your tune. On the newer encrypted trucks this is where the unlock comes in, so follow the tuning steps in order before you drive it. Check for coolant and exhaust leaks, confirm everything is tight, then start it up and watch for a clean idle and no codes. If rusty bolts and tight engine bays are not your idea of a good weekend, a diesel shop that knows Cummins deletes can take it on, and that beats fixing a rushed job later. Whichever way you go, having the right kit for your year, bypass cable and all, is what keeps the install from turning into a fight. Do Not Skip Transmission Tuning It is worth saying plainly because it is the most expensive mistake Cummins owners make. If you have the automatic and you add power, you need a tuner that includes transmission management. The tune raises line pressure so the clutches clamp harder and hold the extra torque instead of slipping and burning up. A cheap tuner that only bumps engine horsepower and ignores the transmission is not a bargain. It is a repair bill waiting to happen. The right tune protects the drivetrain while it adds the power, which is the whole point of doing this properly. How to Choose, Quickly Weigh these and you will land on the right tuner for your truck. Your model year, which decides what fits and whether you need a bypass or unlock Transmission management, which is non-negotiable if you run the automatic and add power Custom versus preset tunes, depending on how tailored you want the setup Screen or phone, whether you want a dash monitor or app control Support, because remote help turns a stressful install into a manageable one For most owners, the EZ Lynk is the strong all-rounder with custom tuning and remote support, the Mini Maxx is the simple plug-and-play choice on older trucks, EFI Live is the pick for the smoothest transmission behavior, and the MM3 handles the newest locked trucks. Whichever you choose, the tuner is only half the job. Pairing it with the right delete hardware for your year is what turns the tune into real, reliable power. Frequently Asked Questions Do I need a tuner to delete my 6.7 Cummins? Yes. Remove the emissions hardware without a tune and the computer detects the missing parts, throws codes, and drops the truck into limp mode. The tuner is what keeps it running. Why does my 2018 or newer Ram need a bypass cable? Ram added a Security Gateway starting in 2018 that blocks access to the OBD-II port. A bypass cable lets the tuner connect. A proper delete kit for these trucks includes the cable. Will a tuner hurt my transmission? Only if it ignores the transmission. Added torque with no transmission management can slip and burn the factory clutches. A tuner with proper transmission tuning raises line pressure to hold the power safely. How much horsepower does a tuned 6.7 Cummins make? Gains commonly run from 60 to 150 or more horsepower depending on the tune level, with a big jump in torque. A fully deleted and tuned truck can push well past stock numbers, limited eventually by the transmission and fuel system. Are 2019 and newer Cummins harder to tune? Yes. The computers on these trucks are encrypted and often require an unlock or a connected device like the EZ Lynk or MM3. Always confirm your exact year is supported before buying.
Learn more
Best Duramax Tuner: Top Picks for the 6.6L and LML
Every Duramax owner reaches the same fork eventually. The truck is good, but you know there is more in it, and a tuner is how you get it out. The catch is that the best Duramax tuner does not have one answer. It depends on which engine you have, whether you want to keep your warranty intact, and how much you plan to push the truck. This guide sorts everything out for you. How to get the tuners that actually deliver on a 6.6 Duramax, the numbers behind each one, and a clear read on which fits your truck. Flash Tuner or Inline Module: Pick Your Lane First Before you look at any specific product, you need to know which type of tuner suits you, because the Duramax world splits cleanly into two. An inline module sits between the ECU and the engine and adjusts signals in real time. It installs in well under an hour, it adds power without permanently rewriting anything, and on newer trucks it is often the only path that works. It is the plug-in-and-go option. A flash tuner reprograms the ECU and transmission directly. It opens up far deeper control, better transmission tuning, and full custom calibration. It is the choice when you are building past a simple power bump and want the truck dialed exactly to your setup. If you want something simple and reversible, go inline. If you want maximum control and plan to keep modding, go flash. That single decision narrows your shortlist before you spend a dollar. The Best Tuners for a 6.6 Duramax Here are the tuners that consistently earn their spot on a Duramax, matched to what each one does best. Edge Pulsar The Pulsar is the go-to inline option, especially for newer trucks. It installs right over the ECM, adjusts power levels through your cruise control buttons, and delivers real gains without a dash full of wires. On an L5P it is one of the few self-install options that actually works around the locked computer. Expect gains in the range of 90 horsepower and 150+ lb-ft of torque depending on the truck. It is the best pick for an owner who wants meaningful power, an easy install, and the ability to switch levels on the fly. Banks Derringer The Derringer is the answer for owners who want more power but are not ready to walk away from their factory warranty. It is warranty-friendly, it pairs with an in-cab gauge that monitors everything worth watching, and it spreads its power cleanly across the rpm range. Depending on year, it adds somewhere around 60 to 80 horsepower and up to 144 lb-ft of torque across multiple levels. If keeping the truck warranty-safe matters to you, this is the one to look at first. EZ Lynk Auto Agent The EZ Lynk is the custom-tuning favorite. It plugs into the OBD-II port and connects to your phone, so your tuner can send files and updates straight to the app with no laptop involved. Owners consistently praise the support that comes with it and the ability to run as many custom tunes as they want. It is the best fit for anyone who wants a truck tuned specifically for their setup by a pro who knows the Duramax platform. That is exactly why we include it in our delete kits, so the tuning is handled for you from day one. Custom Flash Tuning For owners chasing the most out of their engine, a custom flash tune from a proven Duramax calibrator is the ceiling. Platforms like EFI Live let a good tuner tailor every parameter to your exact truck, transmission included. It takes more effort and a tuner who knows the platform, but nothing else matches it for a serious build. Best Duramax Tuner by Model Year Picking the right tuner starts with knowing which Duramax you are running. GM changed the engine and its computer across generations, so a tuner that fits an LML will not always work on an L5P. Match your truck to the right group below, then browse the Duramax delete kits built for your setup. LML Duramax 2011 to 2016 The LML is one of the most flexible Duramax platforms to work with. Both flash tuners and inline modules support it, custom tuning options run deep, and owners see strong gains once the truck is dialed in. If you run an LML, you have the widest set of choices of any Duramax generation. Start with the kits made for the 2011 to 2016 Duramax to match the right hardware to your truck. L5P Duramax 2017 to 2023 The L5P is where things get interesting. GM built these trucks with a nearly locked ECU, so the old trick of plugging into the OBD-II port and flashing is gone. Tuning an L5P now means an inline module like the Pulsar, an ECM swap, or a professional unlock. The power is absolutely there, the L5P responds beautifully once tuned, but the path takes the right tool and exact-year compatibility. Confirm your tuner supports your year, then look at the 2017 to 2023 Duramax options built for the L5P platform. A Word on Warranty and Power Levels One thing Duramax owners weigh more than most is the warranty question. If your truck is still covered and you want to keep it that way, a warranty-friendly option like the Banks Derringer lets you add power without burning the factory coverage. If you are past warranty or simply do not care, a custom flash tune opens up far more. The same logic applies to power levels. Most quality tuners give you a range, from a mild economy setting up to an aggressive performance level. Match the level to the job. A tow tune and a race tune are not the same, and running the right one keeps the truck happy under load. Final Thoughts If you want the short version, weigh these and you will land on the right tuner. Your engine and model year, which decides what even fits, starting with LML versus L5P Flash versus inline, based on how deep you want the control to go Warranty status, since warranty-safe options exist if you need them Custom versus preset tunes, depending on how tailored you want the setup Support, because a tuner backed by real help is worth it when an install gets tricky For most owners, the Edge Pulsar is the easy-install pick with strong gains, the Banks Derringer is the warranty-safe choice, and the EZ Lynk is the way to go for full custom tuning. Whichever you pick, the tuner is only half the equation. Pairing it with the right delete hardware for your truck is what turns the tune into real power on the road. Frequently Asked Questions What is the best tuner for a 6.6 Duramax? It depends on your truck and goals. The Edge Pulsar is a strong all-around inline pick, the Banks Derringer is best if you want warranty-safe gains, and the EZ Lynk is the top choice for custom tuning from a pro. Why is the L5P Duramax harder to tune? GM locked down the ECU on the 2017 and newer L5P trucks, so you can no longer just flash through the OBD-II port. Tuning now takes an inline module, an ECM swap, or a professional unlock. Can a Duramax tuner keep my warranty? Some can. Warranty-friendly options like the Banks Derringer add power without permanently altering the ECU, which lets many owners keep factory coverage. Always confirm the specifics for your truck. How much horsepower does a Duramax tuner add? Depending on the tuner and level, gains commonly land between 60 and 90+ horsepower, with a matching jump in torque. Custom flash tunes can go further on a built truck. What is the difference between a flash tuner and an inline module? A flash tuner rewrites the ECU and transmission programming for deep, permanent control. An inline module adjusts signals in real time, installs faster, and is easily reversible. Newer trucks often require the inline route.
Learn more
Best Tuner for 6.7 Powerstroke Delete: Top Picks by Model Year
Three boxes dominate here. Compare the best tuner for 6.7 Powerstroke delete builds and see which years are easy and which are locked down
Learn more
