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      08-05-2013, 05:52 PM   #26
newnmpr0ved
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Drives: 2012 135i 6MT AW/CR
Join Date: Feb 2012
Location: Cerritos, California

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U'll be happy with the catless downpipe, but you wont be satisfied until u get the JB4.

I noticed a huge difference (power loss) when removing the JB4 and only running catless DP alone.