---tab Description--- Boost your 2017-2025 6.6L L5P Duramax performance and longevity with our high-quality EGR/DPF 2-in-1 Delete Kit. Designed to eliminate restrictive emissions systems, this kit improves horsepower, torque, and fuel efficiency while reducing engine heat and maintenance costs. Perfect for diesel enthusiasts seeking optimal engine performance and reliability. Key Features Dual Functionality – Combines EGR delete and DPF delete in one kit for a complete emissions system solution. Enhanced Performance – Reduces exhaust backpressure, unlocking better throttle response, increased horsepower, and improved fuel economy. Cooler Engine Temps – Eliminates EGR-induced heat, reducing stress on the engine and extending its lifespan. Reduced Maintenance – Prevents costly DPF clogging and EGR-related carbon buildup, saving on repairs. High-Quality Construction – Made from durable, precision-engineered components for a perfect fit and long-term reliability. Easy Installation – Includes all necessary hardware and clear instructions for a smooth DIY or professional install. Compatible with Tuners – Works seamlessly with aftermarket tuning solutions to maximize performance gains. Specification Exhaust Material T-409 Stainless Steel, it is magnetic. Thickness 2mm thick for long-lasting durability and heat resistance. Inlet Diameter 4.0"/5.0‘’ mandrel-bent construction Maximum flow efficiency, helping your diesel breathe easier Installation 2017-2025 6.6L Duramx DPF Delete Pipe Instruction 2017-2025 6.6L Duramax EGR delete kit instruction Tuner Required for Installation: Installing a 6.6 Duramax delete pipe requires more than just swapping out hardware. When removing of the DPF, CAT, SCR, and/or DOC involves removing and eliminating emission related sensors. A DPF delete capable tuner is required to prevent any check engine light or diagnostic trouble codes from setting. How to Choose DPF Delete Kit? 4” vs 5” Straight Pipe Comparison When choosing a 6.6 Duramax delete pipe, the most common options are 4-inch and 5-inch straight pipes.The 4-inch straight pipe delivers a tighter, raspier exhaust note—especially noticeable at lower RPMs—making it ideal for daily driving or mildly tuned setups where excessive drone is undesirable.In contrast, the 5 inch straight pipe 6.7 Duramax offers a deeper, more refined tone with less high-pitch resonance. It excels in high-output builds and towing scenarios, where increased exhaust flow is beneficial. Driver feedback suggests: 4”straight pipe is great for stock-to-lightly-modded trucks and a quieter cabin 5”straight pipe is perfect for aggressive builds, deeper tone lovers, or anyone maximizing exhaust performance Different Types of DPF Delete DPF Race Delete Only removes the DPF (keeps stock downpipe) Minimal performance gain but cheapest option Best for budget-focused or emissions-testing avoidance Downpipe-Back Delete Replaces exhaust from the turbo downpipe backward Improves mid-range power and throttle...