Exhaust manifold heat shield Problems. Help!!

[MaXx0909]

Alright, so i have 138k kms on my yaris, everything is fine, except that squeaky shifter and those rattles.A while ago, my heat shield starting tapping on the exhaust manifold (no big deal just annoying) but now , i am pretty sure i got an exhaust leak on my manifold somewheres as every time I step on the gas in second and + gear, it makes this noise like if there's air coming out. My concern is , could it be that these two what seems to be bolts, are done and are letting air come out ?
Thanks for the help y'alll
(yes i am aware its rusty and dirty, but i live in canada so salt dosnt help and i get it sprayed with oil before winter so it dosnt rusts and become more orange than the car itself)