Ok, I have noticed a little bit of exhaust fumes in my cab as of late. When i got my Flowmaster installed they plugged up the exhaust and noticed leakage from my Exhaust manifold. So i looked under my hood and i believe i found the Exhaust Man. I am not sure if that is exactly it but is it on the passenger side of the truck about in the middle(away from fire wall and grill)? Is it also covered with a Silver plate.? Sorry im still new to the tacoma engine. i have the 98 2.7l reg cab 4x4. Also what do the cracks look like. I saw several cracks in the silver plate if that means anything.