Very nice, I'll be following this thread. I just sold my 135is for an X3 but I honestly believe the Z4 is a more capable track car. The E82 would have the edge only on straights and coming out of turns but braking and overall handling goes to the Z4. You should add track pads to your list, and maybe even add braking cooling (I did a write up for Aero bumper).
PS: buy my coil overs and camber places, perfect for your 3.0si lol
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Last edited by 3002 tii; 04-22-2015 at 09:25 PM..
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