The K&N 77-3064KTK is a 77 Series high-flow cold air intake for the 6.6L Duramax V8 diesel in 2006 Chevrolet Kodiak and GMC TopKick C4500/C5500 trucks. The manufacturer describes it as a mandrel-bent aluminum tube that replaces the restrictive factory air filter and intake housing with an oversized oiled cotton filter. The manufacturer guarantees a horsepower and torque increase and lists an estimated gain of 10.01 hp on its dyno chart for a 2006 TopKick 4500. Compared with a stock airbox, the smoother, straighter airflow is the reason to pay for this kit. Filter maintenance is also simpler, since the element is washable and reusable and the manufacturer says it needs cleaning only about every 100,000 miles under normal highway driving. Searchers looking for a 2006 Duramax TopKick intake kit, a 6.6 diesel cold air intake, or a reusable K&N diesel air filter upgrade will find this kit fits that need.
The manufacturer says the system is designed to fit some GMC CK4500/5500 TopKick and Chevrolet CK4500/5500 Kodiak models. Check the manufacturer's vehicle applications list for your exact year, model, and engine before ordering.
The manufacturer says the filter is washable and reusable and needs cleaning about every 100,000 miles under normal highway driving. Driving conditions will change that interval.
Sources vary on CARB status for K&N 77 Series intakes, and some are not legal for sale or use in California or other CARB-adopting states. Confirm the status for this specific part number with the manufacturer.
The manufacturer lists this as a bolt-on job that takes about an hour or less with simple hand tools, and another manufacturer listing gives up to 90 minutes. A screwdriver, ratchet set, and several wrenches are the tools called for. The kit includes a heat shield that fits into the former airbox space, and the intake tube is designed to accommodate the factory mass air sensor and the filter minder vacuum hose where equipped, so disconnect and reconnect those carefully. Follow the manufacturer's installation instruction sheet for torque and clamp order.
