323-04 -4 90 degree bulkhead - steel

Speedflow SF323-04 | -4 AN 90° Bulkhead Fitting | Steel

The Speedflow SF323-04 is a precision-machined -4 AN 90-degree bulkhead fitting in steel, designed for routing -4 AN lines through a firewall, chassis panel, or bulkhead where a straight pass-through isn't possible or practical. The 90° angle allows the line to exit the panel parallel to its surface, making it the ideal solution for tight engine bays, transmission tunnels, and firewall installations where space is at a premium and a straight bulkhead would create an awkward hose bend.

Product Specifications

• Part Number: SF323-04
• AN Size: -4 AN
• Angle: 90 degrees
• Material: Steel
• Series: Speedflow 323 — Angled Bulkhead Fittings
• Compatible With: Standard -4 AN flare fittings and hose ends
• Barcode: 9342122031274

Applications

The SF323-04 is the go-to choice when a straight bulkhead fitting won't provide clean hose routing, including:

• Firewall brake line pass-throughs where the line runs parallel to the firewall surface
• Fuel line routing through tight firewall or chassis panel locations
• Clutch hydraulic line bulkhead installations in confined spaces
• Oil and coolant line routing through bulkheads in race car and hot rod builds
• Any -4 AN application where a 90° exit angle eliminates stress on the hose end

90° vs Straight Bulkhead — When to Choose the Angle

A straight bulkhead fitting works well when the line approaches the panel perpendicularly. However, when the line runs along the panel surface before passing through, a straight fitting forces a sharp bend immediately after the bulkhead — stressing the hose end and restricting flow. The SF323-04's 90° angle eliminates this problem entirely, allowing the line to exit parallel to the panel for a clean, low-stress routing path. This is particularly valuable in brake and fuel systems where hose integrity is safety-critical.

For straight -4 AN bulkhead applications, see our SF320-04 listing. Sold individually. Compatible with standard -4 AN flare fittings and hose ends.