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Trying the N20 plus today.
M2/3/4 plugs were really bad on my N55 gapped between .020-.024, so gave up. Maybe plugs were bad, but all cyclinders misfired under boost. And the plugs were purple/red, clearly I need colder.
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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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