A3231C AIR FILTER FOR 2017-2019 DURAMAX 6.6L L5P SILVERADO/SIERRA 2500HD 3500HD

iFJF part No.: FJ-AF07. A3231C Heavy-Duty Air Filter for 2017-2019 Duramax L5P 6.6L The iFJF A3231C Engine Air Filter is purpose-built for the most powerful Duramax ever made the 2017-2019 6.6L L5P turbo diesel V8 producing 445 horsepower and 910 lb-ft of torque. This engine demands an air filter that can flow massive volumes of clean air without restriction especially when towing at highway speeds or climbing grades under load. This direct OEM-replacement filter delivers exactly that. The L5P's variable-geometry turbocharger (VGT) is a precision component with turbine blades spinning at over 100,000 RPM. A single grain of sand passing through a cheap air filter can erode the compressor wheel causing imbalance, reduced boost, and eventual turbo failure. The A3231C's multi-layer synthetic-blend media ensures only clean air reaches your turbo. Key Features L5P-Specific Design: Engineered specifically for the 2017-2019 Duramax L5P airbox not a universal filter adapted to fit. Matches the factory filter's dimensions, seal profile, and airflow characteristics precisely OEM Direct Replacement: Replaces GM part number 84262965 and ACDelco A3231C Maximum Airflow: Ultra-high-capacity pleated media designed for the L5P's class-leading 445hp/910lb-ft output zero restriction at full throttle under load Towing-Ready Durability: Reinforced filter construction prevents collapse during sustained high-load operation essential for towing heavy trailers at highway speeds Advanced Filtration: Multi-layer synthetic-blend media captures fine particulates that can damage the L5P's precision VGT turbocharger 45,000-Mile Service Life: Recommended replacement interval under normal highway/towing conditions Vehicle Compatibility Make Model Engine Years Chevrolet Silverado 2500HD 6.6L Duramax L5P V8 Turbo Diesel 2017-2019 Chevrolet Silverado 3500HD 6.6L Duramax L5P V8 Turbo Diesel 2017-2019 GMC Sierra 2500HD 6.6L Duramax L5P V8 Turbo Diesel 2017-2019 GMC Sierra 3500HD 6.6L Duramax L5P V8 Turbo Diesel 2017-2019 FAQ Q: Will this fit my 2018 L5P? A: Yes designed specifically for 2017-2019 Silverado/Sierra 2500HD and 3500HD with the 6.6L Duramax L5P diesel engine. Matches the factory filter box dimensions and seal perfectly. Q: How often should I replace the air filter on my L5P? A: GM recommends replacement at 45,000 miles under normal conditions. If you drive on dirt/gravel roads, tow frequently, or live in dusty environments (desert southwest, agricultural areas), inspect every 15,000 miles and replace by 22,500 miles. A dirty air filter on a turbo diesel reduces boost pressure, increases EGTs, and kills fuel economy. Q: Is this a washable/reusable filter like K&N? A: No this is a traditional dry media filter, not an oiled cotton gauze filter. Dry filters are recommended for the L5P because (1) they don't risk oil contamination of the MAF sensor, and (2) they provide more consistent filtration throughout their service life without the cleaning/re-oiling maintenance cycle that oiled filters require. Q: Can I use this on a 2020+ L5P? A: The 2020+ Silverado/Sierra HD uses a different airbox design. This filter is specifically for 2017-2019 model years. Check your owner's manual for the correct part number for 2020+ models. Q: What are signs my Duramax air filter needs replacement? A: Watch for: (1) Reduced fuel economy a clogged air filter richens the air-fuel mixture; (2) Black smoke under acceleration incomplete combustion from restricted airflow; (3) Lower boost pr