Aeroflow bellhousing dowel pins offer accurate alignment for the transmission input shaft to the crankshaft pilot bearing. Getting alignment concentric ensures a clean clutch release, along with pilot bearing and transmissionlife and reduced shifting problems. You can replace yourrusty or missing dowels after assembling your long block. These dowels are manufactured to OEM specifications for quality and dimensions to ensure a proper fit. Whether you had a dowel go missing or you just want the peace of mind of a new one in its place, these are the perfect solution when rebuilding an engine.