ATS Diesel GM Billet Flexplate (SFI 29.3)

This ATS Diesel billet flexplate is built to transfer increased diesel torque while maintaining the required crankshaft, converter, starter, and transmission relationship. Review the verified fitment, exact configuration, specifications, included components, and installation requirements below before ordering.

Key Features

• Billet Steel Construction: Machined from 1045 high-grade steel to prevent cracking and failure in high-horsepower Duramax builds handling over 1200 ft-lbs torque.
• Precision Balanced: Computer balanced for zero vibration smooth operation up to 10 000 RPM protecting transmission and driveline components.
• Direct Bolt-On Fit: Replaces OEM flexplate on Allison 1000 transmissions with no modifications required for 2001-2010 6.6L Duramax.
• SFI 29.3 Certification: Meets NHRA IHRA safety standards for flexplates used in competition drag racing and high-RPM applications.
• A: CNC machined from 1045 billet steel with black oxide finish for corrosion resistance and precise tooth engagement with torque converter.
• Engineered and tested for real-world high-torque diesel performance.

Fitment

Specifications

What’s Included

One new ATS Diesel component in the exact configuration shown. Gaskets, hardware, wiring, fittings, fluids, filters, tuning, and companion parts are included only when the manufacturer listing expressly states they are part of this exact configuration.

About ATS Diesel Performance

ATS Diesel Performance develops transmission, turbocharger, exhaust, fuel-system, and drivetrain components for Dodge, Ram, Ford, and GM diesel trucks. Product selection remains exact-application specific.

Related ATS Diesel Parts

• ATS Diesel 2003-07 Ford 6.0L 5R110 Billet Flexplate (SFI Certified)
• ATS Diesel 1989 – 2007 47/8-RH/E Dodge Billet Flexplate
• ATS Diesel 2008+ 68-RFE Dodge Billet Flexplate

Browse the ATS Diesel collection for additional transmission, turbocharger, fuel-system, and drivetrain components.

Frequently Asked Questions

Does this flexplate fit 2001-2004 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, GMC Sierra 3500?
Those are the verified vehicle applications. Also confirm 6.6L Duramax, production split, factory equipment, and every ATS application note before ordering.

Why must the transmission match this flexplate?
The crank pattern, converter pattern, starter position, balance, tooth count, and transmission family must match. A similar-looking flexplate is not proof of compatibility.

Are new flexplate bolts required?
Follow the current ATS and vehicle procedures for bolt replacement, thread preparation, torque sequence, converter spacing, and runout. Do not reuse torque-to-yield hardware where replacement is required.

Installation Instructions

Use the current ATS Diesel instructions and vehicle service information. Verify the exact application, required tools, fasteners, seals, fluids, calibration, torque values, clearances, and startup or relearn procedure. Professional installation is recommended for internal transmission, turbocharger, fuel-system, and driveline work.