Hood Tach Vent Line, 1967-72 GTO/Bonneville/Catalina/Grand Prix

Eliminate fogging and condensation

One of the big problems with the 1967-69 hood tachs was that they fogged up with condensation and were very hard to see. On 1970-72 models with hood tachs, the factory ran a vacuum line from the heater box to the tach to eliminate the fogging—and it worked. OPGI now has authentic reproductions of these vacuum line kits that will work on all 1967-72 hood-mounted, tach-equipped cars. It'll look like yours came factory equipped with it, whether or not it did.