Originally Posted by BADST GS-R
Who told you this? There is no way that the stock manifold is just as good or better than the DC header. I would venture to say that your stock manifold rattled because the heat shield was loose.
https://www.honda-acura.net/forums/s...ghlight=header
And I had removed the heatshield, in fact I removed all of them because the rattle was driving me crazy. Finally I opted for the DC Sport because it was the cheapest and the rattle went away. This topic has been covered numerous times and if you do a search you can find all the info you ever desired.