Reduce inlet restriction for the gas 6.6L in hard-working GM HD trucks

K&N 70-3103 replaces the restrictive factory inlet path on the listed 6.6L gasoline V8 applications. Its American 6063 aluminum with a gunmetal finish tube, oversized oiled cotton gauze filter, and semi-enclosed NextGen airbox are designed to increase measured airflow while retaining the stock engine calibration.

Key Features

• K&N 70-3103 is engineered for the listed 6.6L gasoline V8 applications
• Published airflow gain of 41 percent on the tested configuration
• Published gain of 13.8 horsepower and 16.1 lb-ft of torque without a tune
• American 6063 aluminum with a gunmetal finish intake tube
• Washable oversized filter with oiled cotton gauze
• Semi-enclosed NextGen airbox helps isolate the inlet from engine-bay heat
• Quick-Lock filter interface reduces mounting hardware
• No-Hassle Lifetime Limited warranty

Fitment

Specifications

What's Included

• One K&N 70-3103 application-specific intake tube and airbox assembly
• One oversized washable filter matched to this exact kit
• Application-specific couplers, clamps, brackets, seals, and mounting hardware
• Filter-care supplies, tuning devices, and unrelated engine components are not included

About K&N

K&N developed this NextGen system around the packaging and airflow demand of the listed 6.6L gasoline V8 vehicles. The American 6063 aluminum with a gunmetal finish path works with a vehicle-shaped semi-enclosed airbox and an oversized oiled cotton gauze filter rather than a universal tube-and-filter combination.

Related Parts

• No internal product is linked because replacement filters, cleaning supplies, and companion intake parts must match K&N 70-3103 and the exact 6.6L gasoline V8 configuration.

FAQ

It is the K&N NextGen intake system for the supported 6.6L gasoline V8 applications.

No tune is required for the published gains on the supported stock calibration.

Yes. Service it with the procedure appropriate for its listed filter media.

K&N states up to 100,000 miles under normal highway conditions; inspect sooner in severe dust or off-road use.

No. K&N lists this intake as not legal for sale or use in California on pollution-controlled motor vehicles.

Yes. The exact kit includes the application-specific clamps, couplers, brackets, seals, and hardware required by the current instructions.

No fitment is implied for another engine. This listing requires the 6.6L gasoline V8 configuration and a supported canonical application.

Verify every clamp, seal, sensor connection, wiring clip, and hood clearance, then inspect for air leaks or warning lights.

Installation Instructions

1. Confirm the exact vehicle, 6.6L gasoline V8 configuration, and K&N 70-3103 before removing the factory inlet.
2. Read the current K&N instructions, disconnect the battery if directed, and inventory the tube, airbox, filter, couplers, clamps, brackets, seals, and hardware.
3. Remove the factory airbox and inlet components without damaging sensors, wiring, vacuum lines, or fresh-air ducting.
4. Transfer only the sensors and fittings identified in the instructions, then assemble the application-specific airbox and intake tube without leaving debris in the inlet path.
5. Install the washable filter and Quick-Lock interface, align every coupler, and tighten clamps in the documented sequence.
6. Reconnect all sensors and the battery, verify hood and moving-part clearance, start the engine, and inspect for leaks or warning lights before driving.

California Proposition 65 Warning: This product can expose you to chemicals including antimony oxide and other chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.