For returning customers, please enter your email and password to log in to your account.
For Buick Grand Nationals utilizing a 30-150 Hz MAF output signal. The Digital Variable Control unit proportionally injects more or less water-methanol according to input signals from the mass air flow sensor. Perfect for the fast spooling Grand National turbo. More power over a wider range and better drivability is the result.
Install-Download (PDF)