The original spoked, SFI 29. 1 certified flexplate. Manufactured from premium HSLA 60 grade steel, significantly improve engine acceleration. Zinc plated. Lightweight Flexplates are:SFI 29. 1 certifiedQuality HSLA 60 grade steelTested to 12, 500 RPMLightest flexplate available anywhereManufactured in the USAZinc plated for corrosion protection60. 1 lb. -in. 2 moment of inertial - 51% of the moment of inertia of an equivalent typical OEM flexplate.Significantly improves your engine acceleration and deceleration - QTMRM-925 SBC FlexplateFeatures:(Metric GM 2. 8#) 1986-1996 GM (153 Teeth)SFI 29: 1 Certified @ 12, 500 RPM8 SpokePit Stop USA offers Quick Time Lightweight Flexplate - 1986-1996 GM Metric (153 Teeth) - 8 Spoke - 2.8 lbs. RM-925 at low everyday prices. Be sure to check out all of our products from Quick Time including Quick Time Steel Fans.