i bought a Chevy fuel Block off and modified it for use as a O2 Sensor block off for the 4AGE. to me it looks better than leaving a disconnected O2 sensor.

this works for 3TC fuel and O2 Blockoff also

all that is needed is a dremel and o2 Sensor gasket to trace the shape on to the block off plate.

pic 1 dremel please use eye protection maybe ear also since mine were ringing afterwards


pic 2 small block Chevy Fuel pump Block Off


pic 3 O2 sensor gasket to trace and also needed for block off install


pic 4 finished with cutting


pic s installed on the header with gasket once i get the TRD Header Ceramic Coated it will look awesome

Nice DIY!@!! much easier that having to miss the 02 sensor, or what not.

Thanks..... not a major mod but it looks clean. since i am using a map set up i dont need emission's crap.which will save me 20lbs. cat alone weighs 16lbs by the way if you have the original cat it can be sold for scrap(platinum) 60.00-125.00 on Ebay

holy crap thats alot!!!! hhaha i need to keep the quieter exhaust, dont need any attention from cops

good one santos

Thanks G-Moe

just found out that bosch o2 sensor unscrews out of the mounting plate.
so you can use a o2 bung plug and have a clean look with no mods or work