I recommend buying red silicone gaskets. They seal better IMO and are re-useable. Be very careful of how tight you get those nuts. Factory gaskets don't take very much torque at all (around 7 ft lbs IIRC) and the silicone gaskets take about half of that. Put them on dry with no oil, grease, or sealant. Don't not over-tighten them, that causes more leaks than it fixes. You should always use new nuts and washers too,
I don't but you should
