Hays heavy duty Flexplate for high performance competition Chevy engines are constructed of a thicker than stock steel plate. This enables them to withstand the stress of high-stall torque converters and high-RPM engines. These flexplates are supplied with a ring gear that is securely welded in place and feature a dual bolt pattern for use with a Powerglide or Turbo style torque converter. This flexplate has a 168 tooth ring gear and fits the externally balanced Chevy 454 V8 engines. It is S.F.I. 29.1 certified and zinc dichromate plated to resist corrosion. Other applications available. SFI 29.1 Certified 168 Tooth Ring Gear External Balanced Zinc Dichromate Plated 90 Day Limited Warranty Additional Attributes: GTIN: 00084041100202 Center Bore Diameter: 2.490 in. Engine Balance: External Finish: Steel Material: Steel SFI Certification: 29.1 Tooth Quantity: 168 WARNING CA Proposition 65: No Extened Information: Life Cycle Status: Available To Order Emissions : Legal US Packaging: Quantity of Each: Package UOM: Dimension: 15.6000 x 16.0000 x 1.3000 inches