I don’t know, but there’s a long vent on top that should negate the need.
Mine hasn't leaked a drop in 6,000 miles. Did you install it or a dealer? It mounts, as you may know, with very specific torque.
I'm not going to spend money on something that doesn't give me value back–something I can only know is happening if I look at dyno data.
You've got a great truck, and so do I. We're different. Dive it like you own it and use the fuel of your choice. Enjoy.
You'll never feel a 7% increase in horsepower in your butt dyno. If I recall, it's only 5% increase in torque. I'm not sure I've ever floored my throttle, so why waste the money?