what is the difference between the dc sports 4-1 ceramic header for 94-99 integra GSR and the same header for the 00-01 GSR? is the just the length to the cat?

 

Yes.

 

ok cool. this is strange but the guy who had the car before me was a honda engineer and replaced the bottom half of the header (the second piece), cat, and all exhaust pipes with the same ones from a 00 GSR. when i bought my exhaust for a 94-99 GSR it was about 5 in too long so i had it cut down to fit. so i dont really know which one i should get. im assuming the 00. i dont feel like having it all apart and finding out it was the wrong one.