The Speedmaster DNA® Billet SFI Flywheel (Part# 1-229-009) is engineered for Chevy Small Block 350 and Big Block 454 engines equipped with a two-piece rear main seal. Featuring a 153-tooth ring gear and a 10-inch diameter, this flywheel is precision-machined from billet construction and carries SFI certification for added safety and compliance in performance and racing applications.
Whether you're building a street performance machine or a dedicated track car, this flywheel delivers the durability and balance required to handle demanding power levels. The SFI rating ensures it meets strict industry safety standards, making it an excellent choice for sanctioned racing events as well as high-performance street builds using compatible SBC 350 or BBC 454 applications with a 2-piece rear main seal.
