The sport brakes and the wheels and tires are huge upgrades in performance. VLSD is better than nothing but it isn't predictable like a good LSD. SRM's best feature is showing which gear you are in since on the street I don't want rev match and on the track I do it myself. I don't thing there is any difference in springs on shocks on the sport. The spoiler and chin are better than plain. For $2628 it is worth it IMO.
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