WTB: Stock air box assembly for 2011-2012 Mustang GT

Pressure Ratio

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TCG Premium
Nov 11, 2005
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Glen Ellyn
Will make a great place to hide the NOS solenoids.

haha No. My car had a Roush CAI when I bought it. I plan to install the Pro-Cal. And from what I was originally told was it worked with the stock air box. So I was going to swap it back onto the car. But I heard the Roush CAI may be one of the few that would work ok. Because of the design of it. I am waiting to hear back from FRPP to confirm if this is true.
 

Pressure Ratio

....
TCG Premium
Nov 11, 2005
20,514
12,424
Glen Ellyn
:bigthumb:

So using the pro-cal means keeping the stock airbox? :confused:

Originally I read the Pro Cal had to be used with the stock air box with the K&N filter OR the FRPP CAI. But reading around on forums it seems a couple people used CAI other than the FRPP unit. Because of the designs of a couple aftermarket CAI mimic the stock intake tract. So I contacted FRPP to see what they say.
 

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