im looking at a DC Sport 4-1 header.. and im debating on what to get... whats the difference between the two?? is it the o2 sensor?? and yea just wondering which is good for lsvtec on a 1995 teg.?? and is the collector a 2 1/2?? and i think it might be alittle shorter than a rs ls header if im not mistaken... will either one bolt onto my exhaust system.. cause i know i have to change out my cat. and slap on a 2 1/2 inlet...cause i was planning on getting the 1996-97 but not sure.. let me know peeps!! thanks!

 

 

I'm guessing the first header you mention is for a 1197-2001 USDM Type-R and the second is for a JDM ITR. If so, the difference is that the first has a 2 inch collector and the second has a 2.5 inch collector. Also, the first is probably available as a 4-2-1 and a 4-1. But the second is available only as a 4-1. And the JDM is not CARB legal (since it won't bolt to a USDM cat). But the JDM 4-1 WILL make more power.