TCI LS 6-Bolt Crank SFI Flexplate

TCI LS 6-Bolt Crank SFI Flexplate

The TCI LS 6-Bolt Crank SFI Flexplate is built for high-performance LS applications requiring superior durability and strength. Designed for Gen III and Gen IV LS engines, this SFI-approved flexplate delivers reliable operation in demanding street, strip, and racing environments.

Key Features

• SFI 29.1 approved
• Fits most Gen III and Gen IV LS-series Chevy engines
• Compatible with 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L V8 engines using a 6-bolt crankshaft flange
• 168-tooth flexplate
• Drilled for 11.5" wide GM converter bolt pattern using 6 holes
• Includes converter pilot adapter for older small block and big block Chevy (non-LS) converters
• Flexplate is .035" thicker than stock for increased durability
• Starter ring gear welded on both sides for added strength
• Constructed from high tensile strength material to resist elongation and cracking
• Sized for stock 3/8" mounting bolts and can be drilled for 7/16" high-performance converter bolts

Compatibility Notes

• For 4L60 or TH350 applications using a 10.75" or 11.062" converter bolt pattern, use P/N 399753
• Does NOT fit 1999-2000 6.0L applications with a 0.400" extended crank flange and factory flat flexplate
• Does NOT fit 1999-2000 4.8L applications originally equipped with a manual transmission

Performance Benefits

• Designed for high-horsepower and racing applications
• Improved durability over factory flexplates
• Reduced risk of cracking and flexplate failure under extreme loads
• Smooth and reliable drivetrain operation

Note: Professional installation is recommended to ensure proper fitment and torque specifications.