These RTS Black Premium Series Flexplate's 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. Drilled for 11.5" wide GM converter bolt. 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 Features: Internal Balanced Engine 11.50 Inch Bolt Pattern (4L80E uses all 6-lugs) Black Plated Finish 168 Tooth Ring Gear Street/Strip Applications Black Plated RTS Quality Note: Must use ARP 244-2901 Flexplate Bolts to clear inner crank ring. Please check your bolt spacing before purchase.