A steel lambda / oxygen / O2 / wideband boss for welding into your exhaust system, complete with blaking plug and copper washer.

- M18x1.5 thread compatible with most aftermarket and factory oxygen sensors

- CNC machined for exact tolerances

- Available in mild steel and stainless steel to suit different exhausts

- Can be MIG, TIG or gas welded

The parts are also available separately, please check our other listings.