We don't have the stock intake. It's plumbed into the cab and the filter pulls from the passenger side footwell. We think the mount on the firewall cracked. Haven't torn into it yet. What it comes down to is what Woody mentioned above. Got behind the clock and couldn't get caught up. I was behind the wheel when we blew a motor a few years ago in our old Class 5 so needless to say I was a bit hesitant to push the motor any farther this year. It's no fun when you're the guy who blows up the motor. We figured save it and fight the battle another day.