Airaid Kit Replacement Filter - 721-476

The Airaid Kit Replacement Filter 721-476 is a premium, high-flow performance air filter engineered to optimize airflow and reduce intake restriction in your engine's air intake system. Designed as a direct replacement filter for compatible Airaid cold air intake kits, the 721-476 keeps your induction system performing at its best — delivering the kind of increased horsepower and torque that made your original Airaid kit worth installing in the first place. Whether you're refreshing an aging filter or replacing a damaged one, this is the correct Airaid OEM-spec replacement to restore full performance to your intake setup.

Key Features & Benefits

• High-Flow Performance Filtration: The Airaid Premium Filter is specifically designed for high air flow, reducing intake restriction so your engine can breathe more freely — the foundation of any real performance gain.
• Engineered for Increased Horsepower & Torque: By optimizing airflow across the powerband, this filter supports stronger engine output compared to a clogged or restrictive stock-style paper filter.
• Oval Tapered Design: The 721-476 features an oval tapered filter shape, which maximizes filtration surface area within the constraints of your intake housing for efficient airflow and filtration.
• Kit-Specific Replacement: This filter is purpose-built as a replacement for Airaid intake kits — ensuring proper sizing, flange fit, and performance compatibility with your existing Airaid system rather than a generic universal substitute.
• Dry Filter Media: Listed sources identify this as a dry filter, meaning no re-oiling is required during service — a straightforward maintenance advantage over oiled filter designs.
• California Prop 65 Notice: This product carries a California Proposition 65 warning. Additionally, it is not CARB legal and is not for sale in California.

Specifications

• Brand: Airaid
• Part Number (MPN): 721-476
• SKU: AIR721-476
• UPC: 642046744762
• Filter Shape: Oval Tapered
• Filter Color: Red
• Filter Type: Dry (no oil required)
• Flange Size: 6 in.
• Approximate Dimensions: 4.25" x 10.75" x 9" (oval tapered)
• Package Dimensions: 11.30" (W) x 9.00" (H) x 11.30" (D)
• CARB Status: Not CARB legal — not for sale in California
• Proposition 65: Yes — Cancer and Reproductive Harm warning applies

Fitment

The Airaid 721-476 is a universal-fit replacement filter designed to work with specific Airaid cold air intake and MXP intake kit configurations that use this filter size and flange specification. It is not a vehicle-specific part tied to a single year/make/model — rather, it is the correct replacement element for Airaid intake kits that originally shipped with or are designed around the 721-476 filter. To confirm this is the right replacement for your specific Airaid intake kit, match the part number against your original kit's documentation or contact our fitment team.

Important: This product is not legal for sale or use in California due to CARB regulations. Buyers outside California should verify their local emissions compliance requirements before purchasing.

What's in the Box

• 1x Airaid 721-476 Oval Tapered Replacement Air Filter (Red, Dry)

Why Buy from ThreePiece.us

• Free Shipping on Every Order: Your Airaid 721-476 ships free — no minimum purchase, no hidden freight charges.
• Affirm Financing Available: Spread your purchase into manageable payments with Affirm financing at checkout.
• Expert Fitment Support: Not sure if this is the right replacement filter for your Airaid kit? Our team has served 10,000+ customers and can help you verify compatibility before you buy. Reach us at 813-535-5801 or [email protected].
• In Stock & Ready to Ship: This is a regularly stocked product — not a special order — so you won't be waiting weeks for your filter to arrive.

Frequently Asked Questions

Q: Is the Airaid 721-476 a dry or oiled filter?
A: The 721-476 is a dry performance filter. You do not need to apply filter oil during installation or routine maintenance — simply install and go.

Q: What size is the flange on the Airaid 721-476?
A: The 721-476 features a 6-inch flange. The filter itself measures approximately 4.25" x 10.75" x 9" in its oval tapered shape. Confirm these dimensions match your existing intake tube before ordering.

Q: Can I buy this filter if I live in California?
A: No. The Airaid 721-476 is not CARB legal and cannot be sold to California residents. It is intended for use in states where non-CARB intake components are permitted. It also carries a California Proposition 65 warning for Cancer and Reproductive Harm.

Q: How do I know if the 721-476 is the right replacement for my Airaid intake kit?
A: The best way is to cross-reference the part number in your original Airaid kit documentation, or check the filter currently installed in your intake for a part number label. If you're unsure, contact the ThreePiece.us fitment team at 813-535-5801 — we'll help you confirm the correct part before you order.