The MPerf kit is relatively new, and expensive for what you get. The HAS is the easiest cheapest way to lower the car and it has been around for a long time, so there will be more of them out there. From many accounts, the HAS is not that great, hence lots of sales of people going full C/O or reverting to stock. The MP kit has gotten pretty good reviews so far.
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2015 M3, 2005 330i ZHP, 2015 228i 6MT Track Handling Pack, 2007 M Coupe (Sold)
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