77 Series High-Flow Performance Air Intake System (77-1516KP) by K&N®. Replacement Filter # RU-4990. Use with Pre-Filter # RX-4990DK. Air Filter Height: 5.563" (141 mm). Air Filter Large End Diameter: 6" (152 mm). Air Filter Material: Cotton Gauze. Air Filter Material: Cotton Gauze. Air Filter Color: Red. Clamp Style: Regular. Estimated HorsePower Gain: 7.71 HP @ 4722 RPM. Intake Pipe Finish: Polished. Intake Pipe Material: Aluminum. CARB EO: D-269-31. Includes: 3 Clamps, 1 Couplers. This intake kit is designed for the larger engines typically found in trucks and SUVs. It replaces the factory air intake system with a free flowing K&N air filter and custom designed air intake tube. Extensive dyno testing improved intake airflow and allows these big engines to develop even more torque and horsepower. The end result is better acceleration you can feel.
- Guaranteed to increase horsepower and improve acceleration
- Custom designed and engineered for each application
- Works with OEM computer system
- Available in various finishes
- Includes the world's best air filter, the K&N filter
- Easy to install
- Up to 100,000 miles between servicing
- Million Mile limited warranty
The big "deep breathing" engine in your truck or SUV needs a 77 Series High-Flow Performance Air Intake Kit to unleash all of its power. The kit starts with an oversized conical high-flow K&N air filter, installed in place of the restrictive factory airbox. The large increase in filter area over the stock airbox filter results in a huge increase in airflow and a greater capacity to capture and hold dirt.
The increased airflow continues with a free-flowing mandrel-bent aluminum intake tube in place of the factory air path. The intake tube is available in several finishes. Most kits also include a heat shield that seals against the hood and isolates the filter from engine heat. The reduction in air intake temperature results in a cooler, denser air intake charge and even more horsepower. All components are mounted and connected with high quality materials such as steel, aluminum, silicon or reinforced nylon, to ensure long life.
K&N uses a dynamometer to design its air intake kits to make the most horsepower possible. But their power figures aren't based on just one vehicle, but rather an average of runs by a number of vehicles. This means repeatable numbers and horsepower claims you can count on.
Every 77 Series High-Flow Performance Air Intake Kit comes complete with everything necessary for installation, including comprehensive installation instructions. The K&N filter can go up to 100,000 miles before cleaning is required. And the K&N air filter is guaranteed for one million miles.
K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.