Ford's website says specifically the better set is not for emission controlled vehicles. Any reasoning behind this? I don't see how changing the ring an pinion could affect your emissions, but the last thing I need is a car that won't pass emissions.
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2000 V6 Mustang
H-pipe w/ two 3 chamber flowmasters
C&L Cold Air Kit
Steeda Strut Tower Brace
Steeda Subframe Connectors w/crossbraces
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