K&N 59-2030 Marine Flame Arrestor Round Tapered 3.75in Flange 6in H Stainless

Vehicle Fitment

• Universal Marine Application - fits gasoline-powered inboard and inboard/outboard (I/O) marine engines equipped with a carburetor using a 3.75 in (95 mm) inside diameter flange mount
• Compatible with single-carburetor Rochester, Holley, and similar marine carburetors requiring a round tapered flame arrestor with 3.75 in flange ID
• Suitable for use on ski boats, cruisers, bass boats, and other gasoline-powered watercraft requiring USCG-compliant flame arrestor replacement

Fitment Notes

• This is a universal marine part - fitment is determined by carburetor flange diameter (3.75 in / 95 mm ID), available engine compartment height (minimum 6 in clearance required), and base diameter clearance (minimum 5.25 in). Always verify all three measurements before ordering.
• Not for use on fuel-injected marine engines. Intended for carbureted gasoline inboard and I/O applications only.
• For multi-carburetor applications, verify center-to-center spacing accommodates the 5.25 in base outside diameter of each unit.
• If vent lines are attached to the existing flame arrestor, measure the vent line inside diameter and order the appropriate K&N vent hose kit separately.
• Engine compartment designs and hatch clearances vary by manufacturer and boat model - confirm all dimensional clearances before installation.

Features

• Brings K&N's industry-leading oiled cotton gauze filtration technology to marine engine applications, increasing airflow and horsepower over restrictive OEM-style flame arrestors.
• Dual-function design: serves simultaneously as a high-flow air filter and a USCG-compliant flame arrestor, satisfying U.S. Coast Guard regulations for all gasoline-powered watercraft.
• Marine-approved per SAE J1928 standard - engineered and tested to meet the rigorous requirements of marine fire safety regulations.
• Constructed with an epoxied stainless steel screen housing that resists backfire, vibration, moisture, salt spray, rust, and corrosion in harsh marine environments.
• Oiled cotton gauze filter media smooths and straightens incoming airflow, reducing turbulence and increasing air volume delivered to the carburetor for improved engine performance.
• Washable and reusable - eliminates the need for frequent disposable filter replacements, making it a long-term cost-effective solution for marine engine maintenance.
• Round tapered filter shape maximizes filter surface area within a compact form factor, allowing use in tight engine compartments while maintaining high airflow capacity.
• Pre-oiled from the factory - ready for immediate installation with no prep work required.
• Backed by K&N's 10-Year/Million Mile Limited Warranty for long-term coverage and reliability.

Specifications

• Part Number: 59-2030
• Product Style: Flame Arrestor - Round Tapered
• Application: Universal Marine (Carbureted Inboard / I/O Gasoline Engines)
• Flange Inside Diameter: 3.75 in (95 mm)
• Base Outside Diameter: 5.25 in (133 mm)
• Top Outside Diameter: 3 in (76 mm)
• Filter Height: 6 in (152 mm)
• Top Style: Stainless Steel Metal Cap
• Filter Color: Red
• Filter Media: Oiled Cotton Gauze
• Housing Material: Stainless Steel (epoxied screen construction)
• Marine Approved: Yes - SAE J1928 Standard
• USCG Compliant: Yes
• Washable: Yes
• Weight: 1.1 lb (0.5 kg)
• Package Dimensions: 6.5 in x 6.5 in x 7.25 in
• UPC: 024844024107

Included Components

• 1x K&N 59-2030 Marine Flame Arrestor (Round Tapered, Pre-Oiled)
• 1x Installation Instructions

Product Description

The K&N 59-2030 is a universal marine flame arrestor designed for carbureted inboard and inboard/outboard (I/O) gasoline-powered boat engines equipped with a 3.75-inch carburetor flange. It serves a dual purpose: satisfying mandatory U.S. Coast Guard flame arrestor requirements for all gasoline-powered watercraft while simultaneously functioning as a high-performance air filter that increases horsepower and engine response. The round tapered design features a stainless steel epoxied screen housing enclosing K&N's signature oiled cotton gauze filter media, which smooths and accelerates incoming airflow to the carburetor for measurably improved combustion performance compared to standard OEM flame arrestor units.

The 59-2030 has been engineered and tested to meet the SAE J1928 marine safety standard and is approved for use on all USCG-regulated gasoline marine engines. Its stainless steel construction is purpose-built to withstand the harshest marine conditions - including backfire, high vibration, salt spray, moisture, and corrosion - making it equally suitable for freshwater lakes and saltwater offshore environments. The cotton gauze filter element is washable and reusable, eliminating the ongoing cost of disposable replacements and providing reliable, long-term engine protection from airborne contaminants including dust, debris, and offshore particulates.

Installation is straightforward - the 59-2030 mounts directly onto any compatible 3.75-inch carburetor flange in place of the existing OEM flame arrestor. Before ordering, boat owners should verify three key measurements: the carburetor flange inside diameter (3.75 in), available height clearance above the carb (minimum 6 in required), and radial clearance for the 5.25-inch base outside diameter. For multi-carburetor setups, center-to-center spacing must also be confirmed. This flame arrestor is compatible with Rochester, Holley, and other common marine carburetor configurations using a matching flange size, making it a versatile upgrade for ski boats, cruisers, bass boats, and a wide range of other inboard-powered watercraft.