can i ask you what grade mount did you use??IMHO I would choose the Innovative's with the addition of the Hasport rear mount. That is what I run on my 8th gen. I have tried the injected stock mounts. They work but when you start upping the power your header WILL hit. I have tried Boomba's, they work but at the expense of constant vibration and teeth rattling daily driving. I LOVE my Innovative's with Hasport rear mount, I will never go back. As it is the best combo I have found to date for all around use and comfort. All that with the safety of knowing your shiny new header is not going to be destroyed. Of course this is only IMHO.
Keep calm and carry on,