Speedmaster DNA Billet SFI Flexplate 166 Tooth 2PC RMS for Oldsmobile 400 425 455

The Speedmaster DNA Billet SFI Flexplate (MPN 1-226-004) is a precision-engineered flexplate designed for Oldsmobile 400, 425, and 455 big-block engines. This 2-piece construction features 166 teeth and is manufactured from billet material for enhanced strength and durability, making it an ideal choice for high-performance and street applications requiring reliable torque converter coupling.

Built to SFI specifications, this flexplate combines the strength of billet construction with the exacting tolerances necessary for engine performance builds. The DNA designation reflects Speedmaster's commitment to precision engineering, ensuring proper fitment and operation with compatible transmissions. Whether you're rebuilding a classic Oldsmobile muscle car or upgrading an existing engine setup, this flexplate provides the dependable performance and safety standards needed for both street and competition use.

Key Features & Benefits

• Billet Construction: Engineered from billet material for superior strength and reduced flex compared to cast alternatives.
• 166 Tooth Count: Precision-machined tooth profile ensures consistent engagement with torque converter.
• 2-Piece Design: Two-piece construction allows for modular assembly and easier installation.
• SFI Certified: Meets SFI safety and performance standards for reliable operation in demanding applications.
• Oldsmobile Big-Block Fitment: Specifically engineered for 400, 425, and 455 cubic-inch Oldsmobile engines.

Specifications

Ideal Applications

• Classic Oldsmobile muscle car engine rebuilds
• High-performance street and strip applications
• Engine swaps requiring OldsmobileRMS compatibility
• Competition and racing builds with SFI requirements