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Trifecta makes a time for these blazers, it doesn’t add enough hp or tq for me to spend the money. Their tunes are however non detectable. I ran their tunes on my CTs-V and verified by pulling software before and after. I think they do tune the transmission shift points and can disable autostop. They claim up to +22whp
I’ve been debating upgrading. I already have the trifecta auto stop delete. It’s the trans tuning and throttle re mapping that is sparking my interest
 
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