I think they are M8 x about 3/4 inI'm actually about to change my exhaust one of these upcoming weekends. I figure I may as well replace all the bolts/nuts with new stainless steel ones.
Anyone know the thread/dimensions? so I can go buy them before getting under the car.
I used lock washers- stainless bolts and nuts
Drilling works if you have a good right angle drill setup