This exhaust manifold gasket set by ROL is designed to fit 1985-1990 Oldsmobile 307 engines. The set includes two gaskets with 5 bolt hole quantities and an interior diameter of 1 23/32 x 1 25/32" end ports. The gaskets are made of durable graphite material and have an uncoated, unfinished finish. These vintage car parts are interchangeable with MS15425, MS3337, 18503, MS93036, and 18503GR models and have OE/OEM part number 22529202. They are placed in the engine compartment and exhaust manifold and come in gray color. This is a non-performance part that comes in a pack of 2.