Speedmaster DNA Billet Chevy SBC 350 BBC 454 2PC RMS 10" 153T SFI Flywheel 1-229-001

The Speedmaster DNA Billet Flywheel (Part 1-229-001) is a high-performance, 2-piece modular flywheel engineered for Chevy small-block (SBC 350) and big-block (BBC 454) applications. Built from billet aluminum and finished in black oxide for corrosion resistance, this 10" RMS (Ring Gear Mating Surface) flywheel features 153 teeth and carries SFI certification—meeting safety standards for racing and high-performance street use. The two-piece design allows for easy ring gear replacement and maintenance without removing the entire flywheel assembly.

This DNA-branded billet construction delivers a lightweight yet rigid platform for reliable power transmission in modified and competition engines. Its 153-tooth configuration ensures proper engagement with compatible starters and provides the precision balance and concentricity required for smooth operation at high RPM. Ideal for hot rods, drag racing, circle track, and street performance builds, this flywheel combines durability with the performance pedigree expected in serious Chevy engine swaps and rebuilds.

Key Features & Benefits

• 2-Piece Modular Design: Allows independent ring gear replacement and simplified maintenance without full flywheel removal.
• Billet Aluminum Construction: Lightweight yet rigid design minimizes rotating mass while maintaining strength for high-RPM applications.
• Black Oxide Finish: Corrosion-resistant coating protects the flywheel surface for long-term durability.
• 153-Tooth Ring Gear: Precision-cut tooth profile ensures reliable starter engagement and smooth power delivery.
• SFI Certified: Meets SFI safety standards for racing and high-performance street applications.

Specifications

Ideal Applications

• High-performance Chevy SBC 350 and BBC 454 engine builds and rebuilds
• Drag racing and competition engine setups
• Street rod and hot rod power transmission systems
• Circle track and motorsports racing applications