Do I need a gasket that connects the end pipe to the cat? or can I use the factory gasket?

 

factory one should work

 

anyone else?

 

factory one will be fine. if you are buying the exhaust new, it will probably come with a new gasket. if the gasket is damaged or unusable, a local Autozone or Napa will probably have one in stock that will work.

 

You will be fine with factory

 

hopefully it works, I installed it a few hours ago. This is my 3rd exhaust and countless times taking off the stock and putting it on again. But with starting up the car after I was done, I don't think I'll be installing the stock exhaust anytime soon