Don't worry about running lean. I put a custom dual with top speed axle backs and my Z screams. I even picked up 2-3mpg too. I'm at 22.5 on daily and 28 hwy. Go for it and you will be happy. There is a bit of drone tho.
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Takeda TR3009P Short Ram Intakes, Custom Dual Exhaust, X-Piped with 18" Resonators & TopSpeed Axle Backs. EVO-R Led Third Foglight,
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