No problems with my HKS downpipe yet, I love it for the price!!! and plus it's JDM. I do plan sometime to take it to a machine shop to make it into a twin dump or a bell mouth sometime.

 

Probably the lamest thing about the HKS DP is the fact that it makes no provision for the wastegate gases to exit the turbo, creating a whole lot of unnecessary turbulence. There are plenty of other DP's that at least have bellmouth flanges, if not a divorced wastegate pipe that joins the main piping further down. Go with one of those, even if you have to pay a little more..

 

hmm thats weird because every test that has been run has concluded that having a bellmouth design only adds minimal performance over a dp such as hks or dc.. and i purchased my hks dp for 175 out the door brand new... and it is awesome... it has a great ceramic coating that cleans up great... and the great thing about the hks, is you buy the downpipe for just say 125 used, get a muffler shop to cut/weld on a divorced wastegate for around 30-50 bux and right there 175 for a strong divorced wastegate downpipe...