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O2 Spacer, Stock Mercury Riser
This Unique 1" thick adapter plate provides an installation option for retro fitting a Oxygen sensor and or air fuel ratio gauge for tuning purposes Into Mercruisers most common Wet Joint style exhaust manifold systems. The part is CNC machined from 6061 Billet Aluminum then Naval Spec Hard Coat anodized for corrosion resistance (Beware of inferior non-coated versions)
A unique feature of this adapter is the cooling parts that run along each side of the sensor maintaining consistent temperature of the spacer. Designed to accept all popular 18MM O2 Oxygen sensors.
Whether you're a tuner seeking to add a popular Air/Fuel ratio gauge or you're entering the world of aftermarket fuel injection we have developed the critical part to make this addition a snap. This billet aluminum anodized wedge is at just the perfect angle to allow re-connection of your original exhaust hose. The kit includes (1) O2 adapter wedge, (2) gaskets, and (2) new front attachment studs. Bolt pattern is 3" x 4.5". Designed to fit the Hardin Marine Seaward Manifolds only.
Stainless Steel Oxygen Sensor O2 Bung Fitted to Tailpipe (Each)
These bungs are designed to allow you to weld in an oxygen sensor bung for convenient fuel injection or air fuel ratio calibration.
Universal M18x1.5 thread pitch. Fits most wideband & narrow band O2 sensors. Requires welding.
Note: This part will be fitted to Hardin Marine tailpipes. These must be ordered with Hardin Marine tailpipes. It does not include a plug, see related parts if you need a plug.