The Speedmaster DNA® 1-229-003 is a billet black oxide SFI-certified flywheel engineered for late-model Small Block Chevy 350 engines featuring a one-piece rear main seal. Designed with a 168-tooth ring gear and an 11-inch clutch surface, this flywheel delivers the strength and precision balance demanded by high-performance street and racing applications.
Constructed from billet steel with a black oxide finish for corrosion resistance, this flywheel meets SFI safety specifications for added peace of mind on the track or the street. If you're building or upgrading a late-model SBC 350 with a one-piece RMS, the Speedmaster 1-229-003 is a direct-fit, performance-ready solution.