Just got a lightly used stillen cat back. Going to have it installed professionally, only because I live in an apartment. My question is whether the stock gaskets will fit the stillen exhaust.

 

even though you live in an apartment you can do it yourself. i did my exhaust by myself and took me an hour. for the gaskets i dont think they will fit because the diameter of aftermarket exhaust are a little bit bigger so they need a bigger gasket.

 

There's a custom exhaust place near me, so ill take it there.

My question was whether the stillen exhaust is the same diameter so I can use the oem gaskets.

 

I just did this install myself, and it took about an hour and a half on my back. The gaskets right off of the cats are the same size, but the where the Y pipe meets the midpipe, OEM is a smaller diameter.

 

What did you do about the smaller diameter? Was there an included larger gasket or did you just use the stock?

 

The exhaust comes comes with 3 gaskets, two small and one large. At the cats, I reused the factory gaskets, and the single larger gasket at the other end of the y pipe.