N54 Intake Valves - Walnut Blasting

I decided to drop some money into maintenance as I had some oil leaking due to the valve cover gasket and oil filter housing gasket. I also had them walnut blast the intake valves and thought I would share some before and after shots. I am at 60K miles and didn't have any rough idle symptoms but I can definitely feel how much more smooth the car feels as it climbs the RPM range. Here are a couple of before and after photos.