Ok so I bought a DORMAN exhaust manifold today which is an OE replacement. I got the header on and then I noticed that where the factory o2 bung is on the exhaust manifold, is 'plugged' off with a silver bolt. Keep in mind, the heatshield that comes with the new dorman exhaust manifold has a hole just for this plug as well... comparing the stock header to this Dorman OE header, everything looks similarly the same. the EGR bung fits fine! the only problem is the o2 bung on the dorman is BIGGER.

Now when I try to put the stock O2 sensor back into the new exhaust manifold, it wouldn't fit because the HOLE is too big! Take a look at the pics... a stock O2 sensor vs. the new bung hole on the new exhaust manifold... this is a picture of the plug bolt.

can anyone tell me if O2 sensors come in that size? or am I supposed to buy an adapter plate?

thanks!






Modified by . L 3 3 7 H X R at 1:53 AM 5/22/2006