Huh. Never heard of that one before. Is it a common swap? Something may have gotten messed up in the physical swap itself. If you think it is running lean, get a wideband and see what your read out is. If you are running lean, then its either the AFR needs to be tuned for the motor, or you may be having issues with your filter sitting on the MAF.
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2006 Redline Red Nissan 350Z Base
K&N|Falken
I am just that JDM tight, yo.