A Boninfante Friction Flexplate Can Handle the Power Your Engine Puts Out

The large amount of force exerted by a high torque starter when turning an engine over creates considerable strain on a flexplate. The strain becomes even greater when the engine packs heaps of compression or puts out loads of power. This can cause cracking, rounded off ring gear teeth, and even starter damage—all of which is enough to put an end to your day before it begins. 

A flexplate also transfers power to the driveline. In high performance and racing applications, this means it must prevent the torque converter from ballooning too much and pushing the thrust bearings out of the engine. Further, the flexplate must be perfectly balanced to keep the engine happy when spinning at high RPMs. That’s a lot of responsibility for a thin piece of metal. 

A Boninfante Friction Flexplate can eliminate all these issues. They are made from very strong materials so they are durable enough to withstand as much power as you can send their way.

Streetflex Flexplates
Boninfante Streetflex Flexplates are manufactured from special, high-strength steel using a precision automated welding process to virtually eliminate defects. Features include:

• Multi-piece design with welded ring gear and welded billet adapter
• 1,500 horsepower rating
• Tested to 11,000 RPM
• Exceeds SFI 29.2 safety standards
• Multiple torque converter bolt patterns
• Laser marked
• Matte black finish

Boninfante Streetflex Flexplates are available for 2011-23 Ford 5.0L Coyote and classic small and big block Chevy engines. 

Superflex Flexplates
If your car really brings the heat, upgrade to a Boninfante Superflex Flexplate. Featuring specially selected aerospace grade alloy steel subjected to a proprietary three-stage heat treating process, these flexplates are practically bulletproof. Features include:

• One-piece design with integral ring gear
• Hard-machined to .002-inch TIR tolerances
• Lightening pockets
• In-house stress proofing and finishing process
• 3,500 horsepower rating
• Tested to 20,000 RPM
• Exceeds SFI 29.2 safety standards
• Multiple torque converter bolt patterns
• Laser marked
• Matte black finish

Boninfante Superflex Flexplates are available for small and big block Chevy, GM LS, and Mopar Gen III Hemi engines.