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      11-29-2011, 10:58 AM   #3
SD335M
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Drives: 2011 335i M, E90 LeMans Blue.
Join Date: Aug 2011
Location: San Diego

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If you're talking about BMWs Performance Power Kit (PPK), I would say its worth it if you're looking to stay within warranty. Although I probably would not pay over $1000. I luckily got it for $685 labor and all out the door.
I for sure can tell the difference. I have the silly dynolicious app on my iPhone and my base stock 0-60 runs we're 5-5.1a few months ago. But last week messing around and just leaving the car in Drive I accomplished a 4.82 and a 4.91 with my girlfriend in car. Another benefit of the PPK, your exhaust note changes too. Well good luck on your decision.
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