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Like any major engine modification, the TFS package requires custom, post-install PCM tuning to achieve an optimum balance of performance and driveability. We sent our car's computer off to Tony Gonyon (shown), at TunersInc. in Orange Park, Florida, who has extensive experience with the late C4's complex OBD-II brain. Once the recalibrated unit arrives back at VETTE HQ, we'll be ready to perform our usual battery of dyno and track testing.