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I was wondering what is the difference between the 4-2-1 Race header offered by Focus Central and the 4-1 Race header offered by Focussport or is there even a difference?
nonlucendo said:Why is the 4-1 illegal and not the 4-2-1?
because its moved from the stock location and will fail visual00focus said:So how is the 4-1 illegal if it still uses the cat and 02 sensor???