AIRAID 721-128 Universal Oval SynthaMax Dry Air Filter 4.5" Flange

Vehicle Fitment

• Universal fit - designed for custom intake systems and a wide range of aftermarket applications
• Confirm flange size (4.5" / 114 mm inside diameter) and space clearance before installation

Features

• Premium universal performance air filter designed to improve airflow and engine performance
• SynthaMax dry synthetic media - washable and reusable for long-term use
• Multi-layer construction enhances filtration efficiency and airflow
• Oval tapered shape maximizes surface area for increased intake flow
• Clamp-on design for easy installation on compatible intake tubes
• Flexible frame aids secure fitment in varied setups
• Made in the USA with durable materials and high-flow design
• Backed by AIRAID's No-Hassle Lifetime Limited Warranty

Specifications

• Part Number: 721-128
• Brand: AIRAID
• Filter Type: Universal oval tapered air filter
• Filter Media: SynthaMax dry synthetic (washable/reusable)
• Flange Inside Diameter: 4.5 in (114 mm)
• Flange Offset: 5.5 in (140 mm)
• Top Outside Length: ~9 in (229 mm)
• Top Outside Width: ~4.5 in (114 mm)
• Base Outside Length: ~11.5 in (292 mm)
• Base Outside Width: ~7.0 in (178 mm)
• Height: ~7.375 in (187 mm)
• Frame Design: Flexible
• Color: Red
• Installation: Clamp-on universal fit
• Warranty: AIRAID No-Hassle Lifetime Limited Warranty
• Made in the USA

Included Components

• 1x AIRAID universal oval SynthaMax dry air filter

Product Description

The AIRAID 721-128 Universal Oval SynthaMax Dry Air Filter is a high-flow performance air filter designed for custom intake systems and many aftermarket cold air intake applications. Built with SynthaMax dry synthetic media, this filter improves airflow and filtration efficiency, enhancing engine breathing and throttle response. Its washable, reusable design allows easy maintenance without the need for filter oil or replacement.

This universal filter features an oval tapered shape with a 4.5" (114 mm) inner diameter flange and 5.5" (140 mm) flange offset, allowing compatibility with a wide variety of intake tubes and custom setups. Installation is simple with a clamp-on fitment, and the flexible frame ensures a secure mount. Backed by AIRAID's No-Hassle Lifetime Limited Warranty and made in the USA, the 721-128 provides a durable and reusable solution for enthusiasts seeking improved intake performance and filtration.