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"Viper spec" is a common term thrown around when it comes to T56s, so don’t confuse it with RSG’s Son of Tranzilla since they aren’t the same thing! Here you can see the Viper-spec single-carbon blocker rings on the left and the Tranzilla double carbon rings on right. RSG only does "Viper spec" on the stock-style transmissions they build. Viper spec is nowhere near as good as the multi-ring Tranzilla parts.