i have a gsr up dc 421 header that the bottom end meet a untimely end. i notice in the past that the honda lower flange and the dc flanges are the same bolt patern.


what i was wondering how much of a lose do you think i will have using the stock down pipe with the dc top end?

its a 98 crv awd 5 speed with b16 head and gsr cams

 

I can imagine you would lose 4 or 5 horses all across the board. If I were you, I'd go ahead and get a new header.