candid review of bmw performance power kit for n55
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08-05-2013, 05:52 PM
Private First Class
Drives: 14 Honda Civic Si, 17 BMW M4
Join Date: Feb 2012
Location: Cerritos, California
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.
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