KAX CA12405 CF11966 Engine & Cabin Air Filter kit for

KAX CA12405 CF11966 is a paired engine and cabin air filter kit designed to restore engine breathing and refresh in‑cab air for select Chevrolet, GMC and Cadillac full‑size trucks and SUVs from 2019–2026.

This all‑in‑one replacement set bundles an engine air filter and a cabin air filter (with foam seal) so you can address both under‑hood performance and interior air quality in a single purchase. The kit fits specific Silverado, Sierra, Tahoe, Yukon, Suburban and Escalade models and uses multi‑layer filtration plus activated charcoal in the cabin element to reduce odors while protecting engine components from dust and debris.

Which vehicles does this KAX kit fit?

The CA12405 (engine) and CF11966 (cabin) pair was built for recent Chevrolet, GMC and Cadillac large vehicles. Before purchasing, compare your OEM part numbers or model year to the list below to confirm compatibility.

• Chevrolet Silverado 1500 (2019–2026), Silverado 2500/3500 HD (2020–2026 gas, 2021–2026 flex), Tahoe (2021–2026), Suburban (2021–2026), Silverado 1500 LTD (2022)
• GMC Sierra 1500 (2019–2026), Sierra 2500/3500 HD (2020–2026 gas, 2021–2026 flex), Yukon & Yukon XL (2021–2026), Sierra 1500 Limited (2022)
• Cadillac Escalade and Escalade ESV (2021–2026)

How will these filters affect engine performance and cabin comfort?

The engine filter screens airborne particles so the engine breathes cleaner air, which helps maintain throttle response and fuel delivery systems. The cabin filter traps pollen, dust and particulates while the activated charcoal layer helps reduce common vehicle odors for a more pleasant interior environment.

• Engine element: multi‑pleat media captures dirt and contaminants before they reach the intake.
• Cabin element: layered filtration plus coconut shell activated charcoal neutralizes smells.
• Foam seal included to ensure a snug cabin filter fit and reduce bypass.

How easy is installation and how often should I replace them?

Both filters are user‑serviceable with basic tools and are designed for quick swapouts—most installations take under ten minutes when following vehicle instructions. KAX recommends replacing both the engine and cabin filter together on a regular schedule to keep protections balanced and maintenance simpler.

• Typical install time: roughly 5–10 minutes for each filter with standard hand tools.
• Suggested interval: about every 12 months or every 12,000 miles, depending on driving conditions.
• Buying the kit saves time and helps avoid mismatched replacement timing.

What materials and design features are included in the kit?

The kit combines sturdy pleated filtration for the engine and a multi‑layer cabin element that includes an odor‑adsorbing charcoal layer and a foam gasket for secure seating. KAX focuses on durable construction and compatibility with OEM filter housings.

• High‑efficiency pleated media in the engine filter for longer life and consistent flow.
• Coconut shell activated charcoal in the cabin filter to tackle smells and VOCs.
• Foam seal provided to prevent air bypass and ensure proper cabin filtration.

Who is this for: The KAX CA12405 CF11966 kit is aimed at owners of compatible Chevrolet, GMC or Cadillac trucks and SUVs who want a practical, cost‑effective way to replace both engine and cabin filters at once. It's a good choice for DIYers who prefer quick, reliable maintenance parts and for fleet managers seeking a straightforward service item that restores engine intake cleanliness and improves passenger air quality without special tools or modifications.