After doing FULL WOT on the freeway today. Went up to about 110 MPH.
Slowed down back to 75 and it seems like my exhaust is louder now

so now when im coasting at 75-80 its like I have a aftermarket exhaust and I dont like it. No changes to performance either.

also there are strong vibrations in the car like something is shaking. After the WOT on the freeway

Exhaust leak? torn mounts?

 

Broke a belt in the tires maybe?

 

the vibrations and shaking at higher speeds could be from poor grounding connections

 

wheel bearings, tie-rod, balljoints or blister or bump on tire

 

For the vibrations, take it to a good shop. Get them to check it over.
The loud exhaust is probably an exhaust leak if it suddenly started.

 

Very good advice guys.

 

My baffles were so rusted on my stock muffler that they would literally flap back and forth when I pushed on them. It could be that you just blew out a baffle with your James Bond run or sprouted an exhaust leek.

 

I didn't even know about the exhaust baffles, lol. That seems like a much better theory than an sudden exhaust leak.

 

Haha yea. Ill check that out. That does seem more logical.