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Performance Shift is a normal feature of going full throttle for like a second or more. It firms up the shifts and the car essentially thinks its at a track. Holds the car in the proper gear longer, etc. Apparently you never ran your car WOT before the new mods lol. My car does it just fine in stock form.
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SOLD! 9/1/2020 2018 ZL1 A10 Hyper Blue - Rotofab CAI, Gibson catback
@SurefireDetail
OEM ZLE tails/third brake light, Gen5DIY reverse LEDs, front Amber LEDs, SMG laser LED side markers, SMG smoked reflectors
1994 Trans Am LM7/CPT 4L60E/9"
1987 IROC
2006 Silverado
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