A downpipe would truly only be considered a advantage that has a tune. An APR stage II plus the downpipe would provide you with a very nice obtain without needing to enhance the stock turbo/intercooler/engine mounts/tires and many others. I’m getting the DP and stage II flash in another couple https://www.social-bookmarking.org/en/the-ultimate-guide-to-downpipes-for-bmw-m3-g80-maximize-performance