Vibrant Performance 11105 Oxygen Sensor Weld Bung

Great Quality Bung especially for the price. I ordered 4 of these to have 2 extra on hand in case I need to do 02 work on any other car. I have a set of 1976 Cragar Headers I'm going to install on my 5.0 for the engine stand to test and tune before my Pops and I install the engine in his 1969 F100. After wiping down with brake cleaner these welded up perfectly and fit great. The only downside, The header collector is round and the bungs are flat on both sides. Sure I could have ground them down on one side to fit the contour of the header collector, but I wanted to see how they would fit without notching them. They fit amazing and I'm glad I bought 2 extra to relocate the 02 sensors on my 1990 Lincoln Mark VII for easier clearance.

I like these because the collar is plenty tall. I can drop one into the right sized hole cut in a large diameter exhaust tube or a small one, and the radius of the curve is still filled in by the collar. So I have a nice, tight, no-gap fit to weld up. It's quick and easy with a MIG, if I run the first pass around the pipe a touch cold at a wire speed that's a touch fast -- that penetrates the thinner pipe without burning through -- and then I run around it again on top of that bead with a hotter setting and slower wire speed to penetrate the thick metal of the collar. Another bonus is, the collar is so thick that I haven't had problems with the threads warping out of round from the heat.

They work. Very mild steel, which means they're easier for an inexperienced welder to weld on to the thinner exhaust tubing. Downside is that they'll rust in a heartbeat. While they might be ok for permanent installation of an O2 sensor with stainless threads, if used with a mild steel plug, use high temp anti-seize or you can forget about ever removing the plug again.

Good quality, I only order from vibrant. Its always as described and is a well cut piece

Nice bung. Welded up nice for my wideband a/f gauge. Threads were cut nice and no burs. Perfect flat edge on both sides for a good sealing surface.Overall it’s perfect

Was easy to weld on and works perfectly

Fits

It fits typical o2 sensors. Bought this for my 02 forester and have yet to weld it in. It’s clean though for a bung hole...eheheh