What exhaust parts are interchangeable with the 1.6?

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2001 Mazda Protege LX
Hello, I have a 2001 Protege 1.6 LX and was wondering if any other protege headers (other than the OBX headers) would fit without modification. And what other parts/cars are interchangeable with the 1.6. Such as the 1.8l or something else. Thanks!
 
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