i have a base model 93 corolla i need to put in a new exhaust manifold but im stumped over the two types. you can buy 1 is a basic one and other has this O2 sensor provision or whatever. i took a pic of the car and it seems the o2 sensor is on the pipe after the manifold itself so im thinking i need a basic theres a pic http://imgur.com/IdJKT0d .
another question i had is the old bolts attaching the front plate of manifold look very rusted, i would like to replace these with new, what size bolts are those and what type. i read somewhere people recommend you put something like “never-seize” on the bolt before tightening them. any help will be greatly appreciated. thanks alot.