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**Disclaimer:** Full delete kits remove emissions control systems. These modifications may not be street legal in all jurisdictions. Check local regulations before installation. Our best-selling diesel truck delete kits and tuning harnesses give your Ram Cummins, Ford Powerstroke, or Chevy Duramax the performance upgrade you're after. These proven components eliminate restrictive emissions equipment so your engine breathes easier and runs cleaner. Shop top performers below. ## Best-Selling Diesel Truck Performance Parts You've got options when it comes to upgrading your diesel. Our best sellers represent the parts that real truck owners trust to deliver results—whether you're running a 2013-2018 Ram 6.7L Cummins, 2017-2019 Ford 6.7L Powerstroke, or 2011-2016 Chevy Duramax LML. ### Why These Parts Lead Full delete bundles strip out the DPF (diesel particulate filter) and EGR (exhaust gas recirculation) system that choke your engine's potential. A single delete targets one system; a full delete handles both. The result: better throttle response, cooler engine temps, and no more regen cycles interrupting your day. Tuner harness plug kits from Shibby Engineering are the connector between your truck and custom tuning software. They're engineered for direct fitment on Cummins 6.7L (2007-2024) and Powerstroke 6.7L/6.4L (2008-2025) engines—no splicing, no guessing. ### How to Choose **For Ram Cummins owners:** Your year matters. The 2013-2018 models have different architecture than 2019-2021 trucks, so grab the bundle matched to your truck's build date. **For Powerstroke guys:** Both the 2015-2016 and 2017-2019 full delete bundles are bestsellers because they're bolt-on ready and pair seamlessly with tuning software. **For Duramax LML:** The 6.6L full delete bundle clears emissions junk and lets that turbo actually work. Don't skip the DPF and CAT delete pipes —these are load-bearing parts of any delete system. Also explore our EGR delete options if you want to start with a