Speedmaster DNA Billet SFI Flexplate 153 Tooth 2PC RMS for Chevy SBC 350 BBC 454

The Speedmaster DNA Billet SFI Flexplate (MPN 1-226-001) is a heavy-duty transmission adaptor designed for small-block and big-block Chevrolet engines, including the 350, BBC, and 454 models. This 153-tooth, 2-piece RMS (remote-mounted starter) flexplate combines precision billet construction with SFI certification, ensuring reliability and safety in high-performance and street applications.

Engineered to handle demanding engine-to-transmission interfaces, this flexplate features a durable billet design that resists cracking and flexing under load. The two-piece RMS configuration provides flexibility in starter mounting options while maintaining the structural integrity required for engine swaps, performance builds, and restoration projects. Its SFI rating confirms it meets sanctioning-body standards for drag racing and other motorsports use, making it ideal for both carbureted and fuel-injected Chevy platforms.

Key Features & Benefits

• 153 Tooth Count: Provides precise starter engagement compatibility across multiple Chevy engine platforms.
• Billet Construction: Durable, precision-machined material resists cracking and provides superior strength.
• 2PC RMS Design: Two-piece remote-mount starter configuration allows flexible installation on various platforms.
• SFI Certified: Meets SFI Foundation standards for drag racing and high-performance motorsports applications.
• Multi-Engine Fit: Compatible with Chevy SBC 350, BBC, and 454 engine blocks.

Specifications

Ideal Applications

• Engine swaps and block conversions on Chevy-powered vehicles
• High-performance and drag racing builds requiring SFI-certified components
• Classic car and hot rod restorations with modern drivetrain upgrades
• Street performance applications using multiple Chevy engine platforms