its pretty much a pile of shit
there is a 12 page thread about it on honda tech
http://www.honda-tech.com/zerothread?id=966076
the first 5 pages are pretty worthless (just interested people and hype)
page 6 on is people who have recieved it complaining about everything from
shitty weld quality to fitment issues (
bolt holes not lining up to the head bolt holes not lining up to the head, exhaust ports not lining up, etc)
no dyno comparison available (other than a review by Newman from jdmshit.com, who was selling a very similar product that produced
9 less HP than a real JDM ITR header)
one guy posted a dyno chart on the last page .... but he has other mods and didnt post a before and after for this header so the dyno chart is pretty much useless (IMO)
if you dont mind going through the bullshit of dremmeling out the bolt holes, exhaust ports, smoothing out the shitty welds, etc... and have no way of possibly comming up with the extra $100 for a the real one, then this header might be the choice for you
personally after reading others reviews of it, i would stay FAR away from this piece
the old saying remains true..... "you get what you pay for"