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Is this an owner created build sheet or receipts from a dealer?
If it's the factory spec sheet, I wasn't aware F22's could be optioned with the M Performance LSD. MY understanding is that they are dealer-order only and install post purchase.
I would check the S/N or P/N on the unit before hand if there's no receipts of the purchase from a reputable parts dealer - the housing is identical.
For the premium, maybe $1,000? Personally, I'd buy a good example of a completely stock F22 with the packages you want, preferably CPO. Use the savings to have a Quaife (Helical) or MFactory (helical or clutch pack) unit installed. Keep in mind that the M Performance LSD is very mild with only 25% lock. For nearly the same price, MFactory will sell you the Ring Gear and Clutch Type pumpkin with the %lock of your choice.
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