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      08-01-2018, 11:48 AM   #4
WeekendWarriorz
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Drives: 2021 M2C
Join Date: Jan 2017
Location: Anaheim Hills, CA

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Make sure you have a E18 torx socket for the downpipe hanger onto the transmission bolt. take off undertray, Unclip both o2 sensors from the top, take off the 4 bolts at the bottom of the downpipe, unbolt transmission hanger bolts (Need a lot of extensions!) and then unbolt v band flange and then slide out the downpipe, make sure you unclip the o2 sensors from it's little guides cause it will get caught on them and you'll damage them. You'll be pulling out the downpipe with the o2 sensors on. When the dp is off transfer each o2 sensor one at the time and make sure you put them in the correct spot. Also, mark which plug goes into which at the top of the car.
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2006 Z4 M Roadster Black/Imola Red, FBO VF-Engineering, e85 Flex Fuel-Sold
2012 BMW 135i N55 DCT Alpine White/Coral Red, FBO, TBI, Full e85, JB4 BEF-Sold
2006 Z4 M Roadster Black/Black-Sold
2021 M2 Competition DCT Hockenheim Silver
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