Quantcast Ford Truck Club Forum - View Single Post - installing rbp air intake
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Old January 6th, 2015, 12:15 PM
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glc glc is offline
 

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No performance gain, and you will need custom tuning to avoid running excessively lean.

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS