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1987 Buick Grand National

 
1987 Buick Grand National
1987 Buick Grand National
John connected small hoses and Ts to the wastegates, then ran the hose through the firewall and into a manual boost controller mounted inside the cabin. They had a few more loose ends to tie up before the GN was ready for the dyno, including installing the FAST XFI box, relocating the IAT sensor, and rebooting the plug wires with 45-degree bends to clear the twin-turbo manifolds. View Related Article
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