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Heya,

I've got a header back exhaust, high flow cat, CAI and S-AFCII.

I'm putting my 4-1 headers on tomorrow and wondering should I retune my A/F ratio again, for the headers? I mean my vic was running really rich around 4,800 - 5,200 subtracting up to -15%. In general adding the headers would be making my motor run slightly leaner, will that be ok? I will be installing my Zex 55 shot really soon!!!