you will need to fix it in a tune.. when i did my gear change my tuner had to change the gearing in the tune for it to be correct
HP tuners may not support it so you might want to reach out to them..
ECUTEK and UPREV both support this
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Tuned by (Seb@Specialty-Z)
2011 G37 Cam'd FBO 347whp 280wtq Corn Fed 4.08 Gears
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