I'm up to 20k. Bought most of the big stuff used....ESS 535, forged wheels, Full Gintani exhaust. If I didn't, my bill would be well above 30k.
E92 M3 DCT...Powered by ESS VT2 650/DCT GTS Software/Aquamist HFS-3 50/50/Morr /Toyo R888's
ATCO RACEWAY: 10.65 @ 131.79MPH 1.725 60FT
(Stock ESS 625)