K&N 77-3087KP Cold Air Intake Kit for 15-16 Chevy Silverado/GMC Sierra 2500/3500

Vehicle Fitment

• 2015-2016 Chevrolet Silverado 2500 HD (6.6L Duramax LML, RWD/4WD)
• 2015-2016 Chevrolet Silverado 3500 HD (6.6L Duramax LML, RWD/4WD)
• 2015-2016 GMC Sierra 2500 HD (6.6L Duramax LML, RWD/4WD)
• 2015-2016 GMC Sierra 3500 HD (6.6L Duramax LML, RWD/4WD)

Features

• High-flow cold air intake system engineered to increase horsepower and torque
• Mandrel-bent aluminum intake tube with polished/mirror finish for smooth airflow
• Oversized washable and reusable oiled cotton gauze air filter media for long service intervals
• Designed specifically for 6.6L Duramax LML diesel engines in HD trucks
• Installation can typically be completed in 60-90 minutes with common hand tools
• Replaceable air filter element (RU-5179) for sustained performance and maintenance ease
• Limited lifetime (10 year/1 000 000 mile) manufacturer warranty from K&N
• CARB EO D-269-61 - check local state legality (not legal for sale/use in California on some pollution-controlled vehicles) :contentReference[oaicite:9]{index=9}

Specifications

• Part number: 77-3087KP
• Estimated horsepower gain: ~19.94 hp at ~2950 rpm :contentReference[oaicite:10]{index=10}
• Estimated torque gain: ~19.8 lb-ft :contentReference[oaicite:11]{index=11}
• Filter material: Oiled cotton gauze (red media) :contentReference[oaicite:12]{index=12}
• Intake tube material: Mandrel-bent aluminum with polished finish :contentReference[oaicite:13]{index=13}
• Replacement filter: RU-5179 :contentReference[oaicite:14]{index=14}
• Clamp material: Stainless steel, includes 5 clamps total :contentReference[oaicite:15]{index=15}

Included Components

• 1x Mandrel-bent aluminum intake tube
• 1x High-flow washable oiled cotton gauze air filter (RU-5179)
• 2x Silicone couplers
• 5x Stainless steel hose clamps
• Mounting hardware and brackets
• Detailed installation instructions

Product Description

The K&N 77-3087KP Cold Air Intake Kit is built specifically for the 2015-2016 Chevrolet Silverado and GMC Sierra 2500/3500 HD models equipped with the 6.6L Duramax LML diesel engine. This premium intake system replaces the factory airbox and intake tube with a high-flow aluminum mandrel-bent pipe and a large oiled cotton gauze filter designed to increase both horsepower and torque while maintaining exceptional filtration and durability.

With an estimated gain of approximately 20 hp and 19.8 lb-ft of torque, this kit is ideal for heavy-duty towing, hauling, or performance-oriented diesel builds. The washable filter means fewer replacements, and its lifetime warranty underscores the long-term value. Installation is intended to be straightforward with included hardware and detailed instructions, making it approachable for DIY enthusiasts.

Please confirm your vehicle's year, model, drivetrain (RWD or 4WD), and engine build before ordering. Coverage is confirmed through 2016; 2025 coverage is unconfirmed at time of listing. Note that due to emissions regulations (CARB), legality may vary by state - check local laws before purchase.