Trying to figure out what exhaust headers went with the year for North American Z's

Here is a stab:

240z E30 E36 N33 (U98 non-Emissions)
260z E36
280z N42 N47
280zx U87 P71 W48

 

Corrections, additions are welcome.

 

 

 

 

The same header fit for 1970 through 1976 model years. 1977 and 1978 models had the round exhaust port heads, so the headers were slightly different to accommodate the port shape. I don't know much about ZX's, so I won't guess.