Part number (700010) is a steel 160 Tooth Buick flywheel for use with Buick and Oldsmobile 3.8L V6 Engines with 2 piece rear main seals. It features a 160 tooth ring gear and weighs approximately 29Lbs. Our steel flywheels are manufactured from billet steel. and caries a SFI 1.1 safety rating. They are CAD/CAM-designed and CNC-machined from billet steel for precise, no-hassle,bolt-in installation.