I think the carbon kits come with ceramic diff balls (not 100% sure, as i haven't had a kit!). Not 100% sure about S1 kits like i say, but wouldn't surprise me if they are still ceramic, because it saves them having 2 different diffs for the car.
There aren't any non threaded shocks available for the SX as far as i know. The S1 car pics that i have seen still have the same shocks.
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Matthew White
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