K&N 99-04 Chevy Silverado V8-4.8/5.3L Polished High Flow Performance Kit - 77-3021KP Resonators Includes thermostat and high-quality replacement

Includes thermostat and high-quality replacement gasket

YSCPF4a (Ø38mm

These manifolds have 25% Thicker walls than the crack-prone factory manifolds

304 Stainless Steel Laser Cut Head Flanges

This design ensures optimal resistance and accurate turn ratios

K&N 99-04 Chevy Silverado V8-4.8/5.3L Polished High Flow Performance Kit - 77-3021KP Resonators Includes thermostat and high-quality replacementGain a guaranteed increase in horsepower and torque with a K&N cold air intake system featuring a mandrel bent aluminum intake tube. Each system is paired with a washable, reusable High Flow Air Filter featuring oiled cotton filter media. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield or air box helps protect intake air from the high