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Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
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Bungs
Weld-in bungs are the foundation for adding oxygen sensors, exhaust gas temperature probes, wideband controllers, or air/fuel ratio gauges to your exhaust system. This collection covers the bungs you need to properly mount sensors in headers, downpipes, test pipes, and cat-back systems—whether you're tuning, diagnosing, or building a custom exhaust.
Choosing the right bung comes down to thread size, material, and sensor type. Most common passenger-vehicle O2 sensors use an M18×1.5 thread; larger diesel or industrial applications may call for M12 or M14. The bung material should match your exhaust tubing—mild steel for aluminized steel, 304 stainless for stainless systems—to ensure clean welds and corrosion resistance. Some bungs include a tapered seat for sensor sealing, while others use a flat gasket surface.
- Common M18×1.5 thread for narrowband and most wideband sensors
- Available in mild steel and 304 stainless steel
- Straight and angled profiles to clear tight spaces
- Bungs for standard narrowband, wideband, and EGT probes
For mild-steel exhausts, a zinc-plated bung keeps cost down and welds easily. When you're working with stainless tubing, a matching stainless bung prevents galvanic corrosion. If space around the sensor is tight, an angled bung can angle the sensor away from the firewall or transmission. No matter the project, starting with the correct bung saves rework and keeps your sensor sealing leak-free.
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$33.00
This RockJock custom-machined weld-in bung is engineered for high-strength suspension fabrication, specifically designed to accept forged Johnny Joint rod ends or any 1"-14 right-hand thread rod end. To simplify chassis tuning and alignment, the bung features a hexagonal shape rather than a standard round profile, allowing for easy bar adjustments with a wrench even after installation.
The kit includes a precision-machined jam nut that matches the hex size of the bung, ensuring a clean aesthetic and requiring only one wrench size for both components. This set is designed to fit securely into tubing with a 1.25-inch internal diameter (I.D.).
- Thread Size: 1"-14 RH
- Fitment: Designed for 1.25" I.D. tubing
- Body Shape: Hexagonal for ease of adjustment
- Included Hardware: Matching custom-machined jam nut
- Compatibility: Fits Johnny Joint rod ends and 1"-14 threaded links
- Manufacturer Part Number: CE-9113B
$16.48
The Fragola Performance Systems -10AN Male Steel Weld Bung (MPN 597110) provides a reliable, permanent plumbing solution for custom automotive fluid systems. This fitting is engineered to be welded directly onto steel reservoirs, oil pans, fuel tanks, or catch cans, creating a high-strength -10AN male flare connection for performance plumbing.
- Material: High-quality weldable steel for clean, secure attachment to steel components.
- Fitting Size: -10AN Male flare.
- Application: Ideal for custom oiling systems, fuel cells, and cooling system modifications.
- Precision Machined: Manufactured to strict tolerances to ensure leak-free performance with standard AN hose ends.
- Part Number: 597110
$16.20
The Fragola 499520 -10AN Female Weld Bung is a precision-machined component designed for custom plumbing and fabrication projects. This 1.0-inch diameter bung provides a secure, leak-free female AN port when welded to fluid reservoirs, oil pans, or catch tanks, allowing for easy integration of high-performance hoses and fittings.
- Brand: Fragola Performance Systems
- Part Number: 499520
- Fitting Size: -10AN
- Fitting Type: Female Weld Bung
- Diameter: 1.0in
- Application: Fabrication and custom fluid systems
$21.95
The Fragola Performance Systems -12AN male weld bung (MPN 497112) provides a professional solution for adding a threaded flare connection to custom-fabricated aluminum components. These bungs are specifically engineered for welding onto fuel cells, dry sump tanks, oil pans, or valve covers where a secure -12AN interface is required.
Manufactured with precision tolerances, this weld-on fitting ensures consistent thread engagement and a leak-free seal when paired with standard AN hose ends. It is a staple for custom plumbing in high-performance automotive cooling, lubrication, and fuel systems.
- Manufacturer Part Number: 497112
- Fitting Size: -12AN
- Thread: 1-1/16-12 UNJ
- Fitting Style: Male Flare Weld-On
- Material: Aluminum
- Application: Custom fabrication for tanks, pans, and fluid reservoirs
$15.14
The Fragola -10AN Male Weld Bung (MPN 497110) is a precision-engineered plumbing component designed for custom automotive fabrication. This weld-on fitting allows you to add a secure -10AN male connection to any weldable surface, making it ideal for plumbing custom fuel tanks, catch cans, dry sump oil pans, or cooling system expansion tanks.
- Part Type: Male Weld Bung
- Fitting Size: -10AN
- Manufacturer Part Number: 497110
- Application: Universal weld-on for tanks, pans, and reservoirs
- Features precision-machined threads for a reliable, leak-free seal with AN hose ends
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