The K&N 57-3034 is a 57 Series FIPK cold air intake built for the 6.6L Duramax diesel in 2001-04 Silverado HD and 2001-04 Sierra HD trucks. It replaces the factory airbox and intake tube with a black, rotationally molded HDPE tube, a heat shield, and a large oiled-cotton filter. Its main advantage over stock is airflow: the manufacturer lists an estimated torque gain of 26.4 lbft. Because the filter is washable, it also avoids the recurring cost of disposable paper elements. Owners searching for an LB7 Duramax cold air intake or a 2001-2004 Silverado 2500HD 6.6 diesel intake should note that the "V8" in the listing refers to this diesel engine, not a gas motor.
Compared with a filter-only swap, this kit changes the whole intake path, which is what the manufacturer's guidance emphasizes. The filter only requires cleaning every 100,000 miles under normal highway driving conditions, and the entire system can be installed in 60 minutes or less. Owners on user forums are divided on the oiled filter, however. Some report that it can affect the mass airflow sensor and recommend a dry filter instead, so keep the filter maintained and watch for drivability changes after installation. Warranty terms also vary between sources, so confirm them with the manufacturer before purchase.
The manufacturer's installation sheet lists 2001-04 Silverado HD and Sierra HD models with the 6.6L diesel. The manufacturer also states the kit was designed for 2001-2003 models and 2004 LB7 trucks. Coverage for 2004 trucks varies between sources, so confirm your model year and engine with the manufacturer before ordering.
No. The manufacturer states this kit was not designed to fit vehicles with a body lift.
Yes. Disconnecting the negative battery cable erases preprogrammed electronic memories, so the manufacturer advises writing down memory settings first. Some radios will also require an anti-theft code after reconnection.
Owners on user forums report that oiled filters can cause mass airflow sensor problems, and some recommend a dry filter as an alternative. Check your sensor readings and drivability after installation.
The manufacturer's installation sheet calls for a basic tool set: an 8mm socket, ratchet, short extension, flat-blade screwdriver, 7/16-inch wrench, 10mm wrench, and a T-30 driver. Start by turning off the ignition and disconnecting the negative battery cable, but record your radio and memory settings first, since that step erases them. Follow the photo for the mass air sensor assembly orientation, because the sheet specifically calls out the electrical connector position. Use only the hardware in the kit and follow each step, since skipping steps or substituting fasteners can cause problems. Confirm the truck does not have a body lift before you start, because the kit is not designed for that setup. Most owners can finish the job in roughly an hour once the factory airbox is out of the way.
