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)

 

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

 

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

 

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..

 

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.

 

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

 

cool thanks

 

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