ienotsr

i have a set of long tube hooker race headers going on my 305 and want to know what to do about the O2 sensors that are needed for the exhaust(it's a fuel injection system)

blown3rdgen

get a bung welded on before you install them ($5-10)

ienotsr

whats a bung?i searched and got things being put places...very scary stuff.

klumb15

its an o2 sensor bung...jegs carries them, your exhaust shop prolly has them too...they are just little round donuts sorta, with threads tapped on the inside. then you just have the exhaust shop cut a hole in collector and weld in the bung..easy as that..

ienotsr

ok...how many do i need.the new exhaust system is a dual header,cat,straight through muffler that comes out just behind the front tires.

klumb15

should be just one...one on the driver's side...

ienotsr

cool thanks

CAH383

If you don't want to get the "bung" an 18mm nut will do the same also. NAPA has em for like a buck.