A-U5LB0013-AI Gasket Set, Lower with Rear Rope SealOne New Aftermarket Replacement Lower Gasket Set with Rear Rope Seal for Perkins 4. 108 Industrial and Marine Engines This lower (bottom end) gasket set covers the oil sump pan and lower engine assembly of the Perkins 4. 108 four cylinder diesel engine. Designed for industrial, agricultural, commercial, and marine applications, the set provides all gaskets and seals needed for a bottom end engine overhaul, including a rear rope crankshaft seal.