[bigjae1976]

MCS is the standard for its results and also…let's admit…marketing. I'm not a fan of KWs. I think they spec spring rates way too high for bumpy US tracks.

E46 M3…not too different…I run TC Klines and I get just similar results as other cars. I run cheap tires - NT01s and RRs. I'm right there with people running Hoosiers, maybe a second off.

Yes, the TCKs are Koni dampers but they don't require frequent servicing. Mine are 10 years/50k miles and have not been serviced. Still going.

I intend to put TCKs on my E90 M3.

But one thing to consider is setup. That will absolutely be your biggest cost. I'd almost rather blow up an engine than replace the suspension. First, corner balance and alignment - $400-$600 easy. Then the track time to test. More alignments, possible spring rate changes, more corner balancing and then more alignments.

Easy couple thousand.

IMO, the one big factor to consider is support. That's where buying MCS from Bimmerworld pays off. Also TC Kline provides excellent support.

JRZ are nice dampers but I don't know of many proven shops that support them on the E9X platform.