Got an oil leak around the tappet cover on your Cummins 6BT? This complete gasket and seal kit is exactly what you need to stop that drip and keep your engine clean. This set includes both the main tappet cover gasket AND the crucial grommet seals – everything required for a proper, leak-free seal on your 5.9-liter Cummins diesel engine. It's designed for the legendary 6BT engines, both 12-valve and 24-valve models, built between 1989 and 2002. The part numbers line up perfectly: 3284623, 4994848, C3284623, and C4994848. Made from quality materials, it's a straightforward replacement that'll save you a mess and potential engine issues down the road. Super important: before you buy, please take a second to double-check that these part numbers match your old gasket or your engine's specific info. A quick comparison now saves a headache later! This is a must-have for any Cummins owner doing their own maintenance or for a shop stocking common repair parts. Get your engine sealed up tight again.