I did a reroute by just removing the CAS and Coil Pack(though I dont run the stock coils). Its a tight fit but it can be done but is tight. The real trick is getting the old ass gasket off. I used a razor blade and a mirror that dentist use to see the back of the head. the last thing you want is to do a the reroute and then have water dump out cause you didnt remove all the gasket. Cursing also helps.