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I bought a set of M017s (look like SS/1LE wheels), genuine GM TPMS sensors, and Supercar 3 tires 285-f and 305-r, and yes it cost about 3000 dollars in total. With genuine SS/1LE wheels it would cost a lot more, I am talking new parts here of course. The 1LE tires seem to have more cornering grip than my 245-f and 275-r Michelin PS4S tires on stock wheels. Subjectively, they look better than stock. The ride is rougher and there is more road noise from the 1LE tires than the PS4S tires. Cannot directly compare to runflats as I've had the PS4S for a couple years, but from memory, the Michelins had a better ride, less road noise, and better performance than the runflats. So I am now comparing the 1LE tires to something that is better than the stock runflats.
As far as the mod being worth it, cannot really answer that. Stuff for this car costs so much money that you have to either deal with it, or just leave it stock.
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