Does anyone know what the difference between the two is and how I can tell when buying one? Which is better performance wise. Also will I need the 2.5 collector. I have a Civic hatch w/ JDM B20B mated to a 2.5 ince carsound cat w/ 2.5 piping to magnaflow resonator to magnaflow oval muffler. Let me know HT

Forgot to ask: My boy is selling me his DC sports 4-1 header off his 99 Si...will it work on my B20? Or do i have to get one for the Integra LS? I figured that all B-series engines should all be the same? Please help me out


[Modified by jdm4life, 4:34 PM 9/26/2002]