Originally Posted by swamp2
Great, thanks. Does this also mean you measured the OEM pulley at 124mm (4.88"). In the calculations for the AA pulley I used 122mm as the OEM size. I will use these figures for an update.
Swamp I didn't know the exact size of the OEM pulley just what I saw someone else post up. I used 124mm for OEM, if its 122mm then I am off a bit.
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