Aeroflow GM LS 168 Tooth Internal Balance Conversion Flexplate (AF89-350-TH)LS 6 BOLT TO TH350 400 TRANS Includes Crank Adapter, will fit PowerGlide, TH350 & TH400 Transmissions, Suits 10. 75" & 11. 06" Converter Bolt Circle Part Number: AF89 350 TH Heavy Duty Flexplate 168 Tooth InternallyBalanced GM LS Series Engines (4. 8, 5. 3, 5. 7 LS1, 6. 0, 6. 2) to GM Powerglide, TH400, 4L80E, TH350, 2004R, 700R4, 4L60, 4L60E Transmissions. Aeroflow Flexplates are made from extra thick materialand double welded & anodised. These