I think the baffles in my cat are on the way to collapsing and am now thinking of a replacement in the near future.
If the CAT was nearly dead, would it make a loud noticiable noise on start up?
It seems worse when cold.
Once the engine runs at temp it doesnt sound too bad, but whistles?
Is this the noise I can expect to hear when the CAT is fecked?
Start up seems a little lumpier and accelaration isnt as it should.
Lastly, I have a Jetex stainless system on the car, and was wondering if anyone supplied de-cat pipes for a '99 astra sri?
Any advice on these noises to confirm my suspicions would be appreciated.