It's come time to change the cats in my car and before I order the replacements, I want to make sure I get the right ones. I'm sort of in a rush and can't get to the car in person for about a week, hence this question btw. Anyways, I have dual cats, so when I order the new ones (probably flowmaster), do I simply order 2 regular ones, or do the N10 cars have different sized pipes or need specific cats? Think I know the answer but figured I'd ask before pulling the trigger

 

The dual cats are smaller... er... shorter...

 

Any suggestions as to where to find the proper ones? I've heard that the flowmaster ones are junk

 

Measure the diameter of the pipe, and the length, select aftermarket cats that will fit the hole.

 

I just ordered 2 Magnaflow cats that are the proper size. Cost me $140 for both, definitely not too bad

 

Can you post the part number? Are you happy with them?