Mainly a bunch of overpriced parts, some good, some not so. The best thing they offer is the 3.91 rear diff. I also like the rear winglets and rear diffuser. Their exhaust, brakes, suspension, and most cosmetic bits aren't near the best out there, especially compared to other German companies like BBS (for wheels), KW (for suspension) and Mov'it (for brakes). Their exhaust is just a cat back system that costs what a complete header to tailpipe system should. ACS is more into cosmetics than actual performance.
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'08 Carrera S 6MT Guards Red/Black ext leather, Carbon fiber pkg, sport exh, sport chrono +, PASM, Nav, Bose, 19" forged turbos, red tranny tunnel
'07 MV Agusta F4 1000 R 1+1, Corse Red/Silver, RG3 race pipes and factory race ECU
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