| Message | Larger than stock, so 2554Rs+ can benefit.   It will make more power since we saw stock turbos can benefit from larger piping (2.5") from an install and dyno tune we did about 2 months ago.  However I don't recommend it for daily drivers who plan to use the A\C in summer weather. Also not good for road racers. There is not enough airflow to the cooling system. There are things one can do to improve cooling but it may not be adequate enough. If your planning to make big power, drag race and ditch the A\C, look no further.
 For those with our SZ EXP-90 kit and plan to run 30+ psi, I recommend the 4.5" core if going the TDM route Those wanting to have the best possible flow in SMIC form, you can't beat the Massives. You just increase the bends but have stellar cores as well.   One has to decide what they plan to do with the car. Pros and cons to both. We approve of both for use on our own Zs. 
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