nickfn

I just installed a ceramic HP Motorsports header. (Exact replica of the DC sports bolt-on 2001 Civic Header).
However, I overtourqed the two bolts that connect the flanges of the header and the downpipe. Now one of the bolts has broken off, and the other bolt is bent. I ordered two new ones from a Honda dealership, but they asked me to find out if the header thread pattern is the same for the stock bolts or do I need new ones. Does anyone know if the thread pattern to the Hp motorsports (or DC Sports) header is the same as the stock header?

antidote11

They should be the same bolts....I didn't have any trouble with mine, so I would suggest, just getting the new bolts from
Honda and get the torque specs and try it again. You're gonna dig that header...I have the DC 4-1 Ceramics and they ROCK !!
Good Luck man !!

Antidote's Civic

ayzan

If you were able to put them on, then they are the same pattern.

ayzan

Hey is the HP Header smog legal?

Jimmy24

Man, I recomend you take your car's head to a shop to get it checked and make shure you get everything right(threads) Or just drive it there.[IMG]i/expressions/face-icon-small-wink.gif[/IMG]

ALLMAN

iTrader: (2)

If I had to guess the thread pattern would be .....M?(bolt size metric) X 1.25(thread pattern)......Peace!

nickfn

I am pretty sure that the headers have a CARB exemption.