The K&N 50-3103 NextGen Cold Air Intake replaces the factory air box and intake tube on 2020-2025 Chevrolet Silverado 2500 HD and 3500 HD trucks with the 6.6L V8 gasoline engine. The tube is high-density polyethylene, rotationally molded for a large-diameter air path. The semi-enclosed NextGen airbox has an enlarged fresh-air inlet, which the manufacturer says helps lower intake air temperatures and filter contaminants. It pairs with a washable, reusable oiled cotton filter, so L8T owners searching for a no-tune cold air intake get a serviceable, reusable filter.
Compared with stock, the manufacturer estimates about 83.2% more airflow volume and roughly 20.56 horsepower at 4633 RPM, with no tune required. Those figures are manufacturer estimates, so real results will vary by truck. Owners on user forums note the factory system already draws air from the front fender, so the strongest case for this intake is the cooler-inlet airbox and the reusable filter rather than a dramatic power jump. Buyers who want a durable, reusable filter and a modest, tune-free gain have a clear reason to choose it.
Installation is a practical DIY job: the manufacturer states the entire system can typically be installed in under 60 minutes. Expect to remove the stock tube and clamps, transfer the mass air sensor into the K&N adapter, and fit the new tube, airbox, and filter. Long-tail search terms this part answers include 2020-2025 Silverado 2500HD 6.6L L8T cold air intake, K&N 50-3103 NextGen install, and no-tune 6.6 gas truck intake.
The manufacturer lists this part for the 2020-2025 Silverado 2500 HD and 3500 HD with the 6.6L V8. Model-year coverage has been published inconsistently, so confirm your truck's VIN with the manufacturer before ordering.
No. The manufacturer describes the filter as washable and reusable oiled cotton media, so you clean and re-oil it rather than buying replacements. Follow the manufacturer's maintenance guidance for cleaning intervals.
Per the manufacturer's general cold air intake instructions, the factory mass air sensor is removed from the stock air box and installed into the K&N adapter, which then mounts to the new intake tube. Follow the install sheet included with your kit.
The manufacturer states the system typically installs in under an hour. Its general kit steps include removing the stock intake tube, transferring the mass air sensor and gasket to the K&N adapter, installing the edge trim and airbox lid, and securing the filter with the supplied clamp. Because the manufacturer says to follow the instructions for your specific part number, read the included sheet before you start and use only the hardware it lists.
