my 89 Iroc has a leak between the driver side manifold, and the y-pipe, i was told that the exhaust on our cars is preformed not to use a donut, i went to autozone and napa, and neither listed a donut for our cars. I need some advice on how to fix this, it is really annoying, and it is making my oxygen sensor read a little wacky. I have already tried dropping the exhaust back down the jacking it up and evenly tightening the bolts/nuts, and it didnt seem to help any.

 

My fel-pro gasket kit for my old LG4 came with a donut for mine, although I don't need it anymore

 

so then our exhaust systems really are suppposed to have a donut in them?

 

btt