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Hays Twister Full Race Torque Converter GM 4L80E, 3600-4200 RPM stall - 97-1J36F ignition-system 4 L L4 2007 -Overview: Hays Twister Full Race Torque Converters feature a custom designed anti balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans brake and great for power adders such as nitrous, superchargers, and turbos. They are available with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket