Airaid Universal Air Filter - Cone 3 1/2 x 6 x 4 5/8 x 9 - 700-420

The Airaid 700-420 Universal Cone Air Filter is a high-flow, performance replacement filter built for enthusiasts who want more from their intake system. With flange, base, top, and height dimensions of 3½" × 6" × 4⅝" × 9", this tapered conical filter is designed to fit a wide range of custom intake builds, cold air intake upgrades, and short ram intake setups. Whether you're building a custom intake on a truck, SUV, or performance car, the Airaid 700-420 delivers the airflow your engine demands.

Key Features & Benefits

• High-Flow Cotton Gauze & Non-Woven Media: Airaid's premium cotton gauze and non-woven filter material is engineered to increase airflow compared to restrictive paper-element filters, helping your engine breathe more freely for improved performance.
• Designed to Increase Horsepower & Torque: By reducing intake restriction, the 700-420 supports more efficient combustion — a real benefit for anyone building or upgrading a performance air intake system.
• Washable & Reusable: Unlike disposable paper filters, this Airaid filter is fully washable and reusable, making it a long-term investment rather than a recurring expense.
• Tapered Conical Shape: The cone design maximizes filter surface area within a compact footprint, allowing high air volume through a filter that fits tight engine bays and custom intake tubes.
• No-Hassle Lifetime Limited Warranty: Airaid backs this filter with a lifetime limited warranty, reflecting confidence in the product's long-term durability.
• Universal Fitment Flexibility: As a true universal filter, the 700-420 works across dozens of intake builds — ideal for fabricators, builders, and anyone running a custom intake tube or upgrading an existing intake kit.

Specifications

• Brand: Airaid
• Part Number (MPN): 700-420
• SKU: AIR700-420
• UPC: 642046704209
• Filter Style: Tapered Cone (Universal)
• Flange Diameter: 3½"
• Base Diameter: 6"
• Top Diameter: 4⅝"
• Height: 9"
• Filter Material: Cotton Gauze & Non-Woven
• Washable: Yes
• Warranty: No-Hassle Lifetime Limited
• CARB Status: Not CARB Legal — not for sale in California
• Proposition 65: Yes

Fitment

The Airaid 700-420 is a universal fit air filter — it is not vehicle-specific by year, make, or model. It is intended for use in custom intake builds, fabricated intake systems, and intake kit upgrades where the intake tube or inlet opening accepts a 3½" flange. It is commonly used in cold air intake builds, short ram intakes, and custom engine bay fabrication projects on trucks, SUVs, and performance cars.

Important: Because fitment depends entirely on your intake tube's inlet diameter matching the 3½" flange, always verify your intake pipe's inner or outer diameter before ordering. If you're unsure whether this filter will work for your specific build, contact the ThreePiece.us fitment team for guidance before purchasing.

Not for sale in California — this product is not CARB Legal and cannot be shipped to California addresses.

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimum order required.
• Affirm Financing: Break up your purchase into manageable payments with Affirm financing, available at checkout.
• Expert Fitment Support: ThreePiece.us has served 10,000+ customers with hands-on fitment expertise. Not sure this filter fits your intake setup? Call or email the team and get a real answer before you buy.
• In Stock & Ready to Ship: The Airaid 700-420 is a regularly stocked product — no long lead times on this one.

Frequently Asked Questions

Q: Is the Airaid 700-420 a direct-fit filter for a specific vehicle?
A: No — the 700-420 is a universal cone filter, not vehicle-specific. It fits any intake application with a 3½" inlet opening. You'll need to match the flange diameter to your intake tube before ordering.

Q: Can I wash and reuse this filter?
A: Yes. The Airaid 700-420 is fully washable and reusable, which is one of the key advantages over disposable paper filters. Airaid also backs it with a no-hassle lifetime limited warranty.

Q: Is this filter legal to use in California?
A: No. The Airaid 700-420 is not CARB Legal and cannot be sold or shipped to California. If you are located in California, please contact us to explore alternative options.

Q: Does ThreePiece.us offer financing on this product?
A: Yes — financing is available through Affirm at checkout, allowing you to split the cost into smaller payments. Free shipping is included on every order as well.