Thread: Best Pulley
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      11-28-2012, 04:14 PM   #90
Dave07997S
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Drives: 2013 BMW M3 ZCP Coupe
Join Date: May 2009
Location: Playa del Rey, CA

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The AFE is 4.124" in diameter, according to my calculations this makes it a 84.5 of the OEM diameter or a 15.5% reduction if my calculations are correct.

Dave
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2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk