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Discussion Starter · #1 ·
Why cant i change the shift firmness on either or on my challenger. when i had the 300c i can change that. i have a 2008 srt 8 with exhaust done intake and i believe headers and so on i bought it used with 7000k miles. i need the 180 tstat. what can i do and i am using the 91 cai tune with 93 octane
 
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