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JB4 tune CT5 V

avatron504

avatron504

New Member
Joined
Feb 25, 2025
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3
Location
California
V-Series Cadillac(s)?
2024 Cadillac CT5-V
I'm considering purchasing a JB4 for my car. If I get it, would I need to use spark plugs that are one or two steps colder? Thanks
 
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