Red Horse Performance Fuel Tank Bung

Red Horse Performance Fuel Tank Bungs: Race-Ready Plumbing Starts at the Source

When you're building or modifying a high-performance fuel system, the bung is one of the most fundamental — and most overlooked — components in the entire setup. A fuel tank bung is the weld-in fitting that creates a threaded port in a fuel cell, custom tank, or fabricated reservoir, allowing AN or NPT fittings to connect cleanly for fuel pickup, return, or vent lines. Getting this foundation wrong means leaks, misaligned fittings, or a compromised seal under pressure. That's why serious builders turn to Red Horse Performance — a brand that has built its reputation on machining precision from the very first thread.

The Red Horse Performance Approach to Fuel Tank Bungs

Red Horse Performance offers two primary bung series that cover the needs of most race and performance builds. The 867 Series features female NPT weld-on aluminum bungs, available in sizes ranging from 1/4" NPT up through 1/2" NPT, and comes in a natural (unanodized) finish specifically designed to promote clean, strong weld adhesion to aluminum fuel tanks and cells. Red Horse also offers a low-profile variant of the 867 Series for tight clearance applications where a standard-height bung would be impractical. The 971 Series rounds out the lineup with male AN thread weld-on bungs, available in a range of AN sizes, also machined from aluminum with a natural finish optimized for welding.

Redhorse Performance fittings — including their bungs — are cut from 6061 T-6 aluminum on CNC machine turning centers, which results in superior thread strength and smoother assembly. This matters enormously for a weld-in bung: consistent wall thickness and true-cut threads ensure that once the bung is welded in place and a fitting is threaded home, the seal is reliable under the vibration, heat cycles, and fuel pressures that racing environments demand.

Why Material and Finish Matter for Weld-On Bungs

Red Horse Performance offers these components to facilitate automotive plumbing projects — they're machined from aluminum with a natural finish for effective welding installation, and are available in a variety of AN thread sizes. The unanodized natural aluminum surface is intentional: anodizing creates an oxide layer that must be removed before welding, so leaving the bung in a raw finish saves fabricators prep time and ensures a cleaner weld zone. Double Viton O-ring seals on Red Horse fittings provide leak-free performance when used with a wide range of racing fuels and fluids — a critical consideration for builds running E85, methanol, or other aggressive fuel blends.

Built for the Builder Who Won't Compromise

Red Horse Performance was founded in 2008 on the back of their unique, hand-polished hose ends , and that same commitment to precision has carried through to every component in their catalog — including their fuel tank bungs. A staple of pristine SEMA and PRI builds, Redhorse is also the go-to choice for weekend warriors across the country and has been associated with record-breaking vehicles on both land and water.

Whether you're building a dedicated race car fuel cell from scratch, retrofitting a return line to an existing tank, or adding a vent port to a custom fabrication, Red Horse Performance fuel tank bungs give you the machining quality and thread precision to do it right the first time. Explore the full Fuel Tank Bung category or browse the complete Red Horse Performance catalog to find the fittings, hoses, and accessories to complete your build.