I don't have an answer to your question but if changing out downpipe is an option it should take max 2 hours on your first try and 1 hour or less after that. Definitely helps to have an extra pair of hands tho.
I usually shy away from doing any work under the hood in fear that I'll break something but I'm glad I challenged myself to see the project through and now am extremely familiar and comfortable with doing the work now.
Either way, good luck!
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18 X3 M40i/ Dark Graphite/ Cognac/ MP ECU Stage 2.5
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