hi guys, im on genuine CSLs, i had to fit a 12mm spacer on the front to fit my AP setup which is 370mm,...... to be honest i was really concerned about fitting the spacers as im not a fan of at all, BUT... they allow me to run crazy camber without strut foul and also fill out the front arches much better, the front CSL isnt a good offset for the z4m.... With the camber changes a grippy tyre and the wider section up front, understeer is REALLY dulled down, down sides??? the car follows all the ruts and bumps in the road :-(
Re the tyres i switch between the ps2 and PSS, both of those are awesome awesome road tyres...... the pss has some serious performance for a street tyre, i find the Ps2 seems to really struggle when they get warm. michelin is the the only tyre my ///M will ever see.
p.s Re the spacers im happy to now say they havent effected anything at all, no wobble or anything, im using ARP wheel studs and magnesium nuts.