This is a DIY on a down pipe for a Tercel but while doing this DIY I ran into problems with the exhaust manifold and replaced the gasket and studs . Make sure when your doing this job you have the car as high as you can safely on jack stands . Always remember to make sure the one you are replacing is the same as the one you took off . First you start off by removing the plug for the oxygen sensor then remove the two studs from the down pipe to the exhaust manifold . This case replacing the nuts and bolts is the best way so I cut them off remembering when putting this back on you put these back on the same way you took them off these keep the pipe from shaking and rattling . Then you put the oxygen sensor back on the down pipe . Now when removing the exhaust manifold you must remove the intake and heat shield then you remove the six nuts holding the exhaust manifold . Remember there is a heat shield that you must put back and the exhaust manifold gasket goes inside the heat shield when you are putting the manifold back . In my case my two way studs were stripped so I replaced them . This is a very easy thing to do make sure you check for damage threads to the manifold . DO NOT USE A VISE GRIP WHEN PUTTING THIS BACK ON . Hand tight once you tighten the down pipe to it the nut will tighten the rest . Again make sure you have the heat shield first then the manifold gasket then the manifold in that order , Some people use a light coat of red exhaust manifold silicone for help or if you have headers sometimes it is best to use it because of the higher heat on the gasket will eat it . Then remembering to use the donut gasket that goes on the down pipe upper and lower ends again if you choose to use a light coat of the red silicone you can but when you tighten down on the pipes and manifold the gaskets will crush into place . Now there was a bracket that held the pipe by the oil pan mounted to the block . If your down pipe doesn't come with one then use a metal clamp and clamp the pipe to the bracket as in photo . Remember to return everything back then start your vehicle and carefully check for leaks , You will see alot of smoke coming off the exhaust manifold that is the gasket molding into place . More info @ www.CorollaCarClub.proboards.com or http://rinconrolla98.blogspot.com .