320-04 -4 flare bulkhead - steel

Speedflow SF320-04 | -4 AN Flare Bulkhead Fitting | Steel

The Speedflow SF320-04 is a precision-machined -4 AN flare bulkhead fitting in steel, designed for routing -4 AN hydraulic, brake, fuel, or oil lines cleanly and securely through a firewall, chassis panel, or bulkhead in performance and motorsport builds. Offering greater flow capacity than the -3 AN SF320-03 variant, the SF320-04 is the preferred choice for -4 AN line systems where a clean, vibration-resistant panel pass-through is required.

Product Specifications

• Part Number: SF320-04
• AN Size: -4 AN flare
• Material: Steel
• Series: Speedflow 320 — Flare Bulkhead Fittings
• Compatible With: Standard -4 AN flare fittings and hose ends
• Barcode: 9342122031151

Applications

The SF320-04 is a go-to bulkhead fitting for performance and motorsport builds requiring clean panel pass-throughs, including:

• Brake line firewall pass-throughs in hot rods, race cars, and custom builds
• Clutch hydraulic line bulkhead routing
• Fuel line firewall and chassis panel pass-throughs
• Oil and coolant line routing through bulkheads in race car builds
• Any application requiring a secure -4 AN line pass-through a panel or chassis member

320-04 vs 320-03 — Choosing the Right Size

The Speedflow 320 series flare bulkhead fittings are available in both -3 AN (SF320-03) and -4 AN (SF320-04) configurations. The -4 AN variant provides a larger internal bore for increased fluid flow, making it the better choice for fuel lines, larger brake systems, and oil line routing where flow volume is a priority. If your system uses -3 AN lines, see our SF320-03 listing.

Why Use a Bulkhead Fitting?

Routing AN lines directly through a hole in a firewall or chassis panel without a bulkhead fitting risks chafing, vibration damage, and an unprofessional finish. The SF320-04 clamps securely to the panel using the supplied nut, providing a fixed, vibration-resistant anchor point that protects the line and delivers a clean, race-ready result. It also simplifies line removal and replacement during servicing.

Sold individually. Compatible with standard -4 AN flare fittings and hose ends.