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On a late generation model like the M3, I wouldn't.
I got one for my F30 because...it was offered to me by the dealership for $600 because they forgot to register my new vehicle warranty, LOL!
On a new model like the F30, it makes more sense since BMW is notorious for ironing out kinks and issues (car's been in the shop for 6 days so far)...on an M3, I would think you'd be fine.
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CURRENT: 2017 RS3 (miss you guys) 
SOLD: 2012 335i Mineral Gray
M Performance Exhaust/Brakes/Suspension/LSD|Bav Stage 1/AMP||ER CP/IC/DP/OC | Dinan CAI/N55 PWG BIG TURBO|BMWF30.com
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