The K&N 57-3032 is a 57 Series FIPK (filter-in-pipe kit) cold air intake for the 8.1L V8 in the Chevy Suburban. It replaces the factory air filter and intake tube with a custom rotationally molded high-density polyethylene tube that routes air to the throttle body, paired with an oversized, oiled cotton filter that can be washed and reused. The manufacturer says the system is guaranteed to increase horsepower and torque and lists an estimated gain of about 13 hp and 16.2 lb-ft. Compared with a stock airbox, the larger airflow path and reusable element are the main reasons to spend more than a basic drop-in filter, and the manufacturer rates the filter for up to 100,000 miles of normal highway driving between services.
The manufacturer lists this kit for the 2001–04 Chevy Suburban with the 8.1L V8, but published fitment for this part number varies, so confirm your model year before ordering. One owner on user forums who fitted it to a 2003 Suburban 2500 reported better fuel economy and a fairly simple install of about an hour. The manufacturer also states the kit is legal for use in all 50 states. Shoppers searching for a 8.1 big block Suburban cold air intake, a washable cotton gauze FIPK, or a 2001-2004 Suburban 2500 air intake upgrade will find the main features covered here.
The manufacturer lists this kit for the 2001–04 Chevy Suburban V8-8.1L. Fitment information for this part number varies across published sources, so confirm your exact year and engine with the manufacturer before purchasing.
The manufacturer rates the washable filter for up to 100,000 miles under normal highway driving. Owners on user forums report cleaning and re-oiling the filter far more often, roughly every 10,000 miles, as part of tire rotation or every third oil change.
The manufacturer states the kit is legal for use in all 50 states.
Owners on user forums describe this as a straightforward DIY job that took about an hour, using the factory mounting points. One owner reported that all seals and gaskets were included, and the kit includes mounting hardware per the manufacturer. Clean the filter and re-oil it with K&N filter oil before installing; the same owner noted that the recharge kit is inexpensive and widely available. Plan extra time if you need to reuse your factory bolts, as one owner recommended checking your own hardware before starting.
