These RTS SFI Black Premium Series Flexplate with removable counterweight for chevlrolet internal & external Balance are made for high performance street car drivetrains. RTS flexplate made specifically for our Holden Chevrolet LS and other popular performance cars. Each flexplate is dynamically balanced to eliminate potentially damaging vibrations and electro-coated black for protection from the elements.

SFI 29.1 approved. Fits Holden, Small and Big Block Chevy internally or Extrernal Balanced V8 engines using a 6 bolt crankshaft flange. Drilled for 10.75" small GM converter bolt pattern and also 11.5" big GM converter bolt pattern. Flexplate is .035" thicker than stock and the starter ring is welded to both sides of the flexplate for additional strength. Constructed from a high tensile strength material this flexplate resists elongation and cracking. All 168 tooth flexplates are sized for stock 3/8" mounting bolts and can be easily drilled for 7/16" diameter high performance torque converter applications.