I just picked up a header off eBay for me 1999 civic ex with a d16y8 engine. It was a cheap header like $80 or so I believe it said is was a jdm. Anyhow I was woundering if anyone else has Reyes one of these because I am having problems with mine. The o2 senser is hitting much axle and the header seems 3 inches to short cuz it won't line up with my stock cat. Thanks

 

Anything on ebay that's cheap and marked "jdm" is a knockoff. Poor quality, poor fitment. Unfortunately, you get what you pay for on those kinds of things.

 

Pics?

You get what you pay for. "JDM" is a search term. The header is definitely not JDM. Link to what you bought? You may need to take it to an exhaust shop to be installed.