I have the one you had to modify and it works fine. My stock had to LCD's go bad so I got this. I would say that if you were waiting because of having to make the modification, then just grab this and drop it in.
Chris
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1999 986 2.5L, Stock Exhaust (S muffler), EVO Intake, 18" Stock rims (17" during winter), IMS Upgrade, 150k+ miles and counting!
87 944S brought back to life
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