so trying to install the STS and my nuts/bolts for the y pipe and cat are rusted.. im worried they will break and don't want to have to replace the whole exhaust...

any ideas of installing this without removing the y pipe n cat?

 

I'm pretty sure you have to remove the cat only. When I did my STS, I did.

Heat those bolts up with some MAP gas, and go for it. Then replace with new hardware.

 

I was thinking of that. im just worried about the connection at the y pipe site busting those

 

You could undo the exhaust at the hangers from the cat to the muffler and let it hang to get some extra room.

 

I like seeing how much room you can get by hanging it but getting it back into position might be tough with 1 person. Just get under there and see how tough the bolts are, if they are then plan B

 

They're tough plan b it is