I done this on my 2006 cbr1000rr but it made a weird rattly noise ( nothing was left loose) i probably took to much out so i brought some US headers no cat don't know if the same for your Z Jay just incase 2008 2009 2010 Kawasaki ZX10R Exhaust Manifold Header Pipe See Video Head | eBay
Not fitted back on the bike yet, so lets hope not. It's a mod I saw on the ZX10R forum and no one whose done it has reported any probs so fingers crossed! Time seems to be flying by now, fairings still at the painters and I need to book a Dyno tune also and Feb the 7th is fast approaching!
I did. The same to my 2005 R1 and then a 2010 speed triple with no problems. People did say that once the cat was out, that section of the exhaust would be like an expansion chamber on a 2 stroke????
