http://www.waldronexhaust.com/drivercontrolledexhaust.htm
For a brief period in 1969 & 1970, GTO buyers were able to purchase an option known as Vacuum Operated Exhaust. It was one of the industrys most unusual options; dual-mode mufflers - controlled by the driver - that could be operated in Quiet or Tiger (Open) modes.
VOE-2 Model
(For 70-72 GTO/LeMans/Tempest)
The VOE-2 model is a close reproduction of the original GTO VOE muffler. It is also a direct fit for any 1970-72 Pontiac Tempest/LeMans/GTO with dual exhaust. If you are lucky enough to have a GTO that was originally equipped with the VOE option, with or without Ram Air, you can restore the VOE function by purchasing the mufflers only, without the control kit.
DCE Universal Model
(For almost everyone else!)
Waldrons has a patent pending design that provides the look and sound of the original VOE Muffler for other vehicles. The universal DCE Mufflers are available in 14, 18, 19 and 21 case lengths, with offset inlets and offset OR center outlets. Available inlet and outlet diameters include 2, 2 ¼ and 2 ½. They will fit a wide variety of AMC, Ford, Dodge, Plymouth, Mercury, GMC, Chevrolet, Buick, Oldsmobile and Chrysler cars and trucks.
And of course, they can be utilized in most street rod or hot rod applications!
Universal DCE mufflers are slightly louder than the VOE-2 model in the Quiet mode. In the Open mode, they sound and flow the same as the VOE-2 model.
Disclaimer: Waldrons recommends that you verify your local sound ordinances before driving in OPEN mode to avoid tickets.
Some of the applications for the universal DCE model:
68-98 Mustang (exc. 74-83)
70-73 Corvette
64-84 Most GM full size including Buick, Chevrolet, Pontiac & Oldsmobile.
68-85 Chevrolet & GMC Trucks
60-80 Most Chrysler, Dodge & Plymouth
68-76 Thunderbird
66-71 Ford Fairlane & Torino
67-71 Mercury Comet & Montego
79-85 Dodge Trucks
66-71 AMC
And many many moreCheck the muffler check the DCE Application Chart for direct fit applications.
DCE Application Chart (Printable PDF, Requires Adobe Reader )
DCE Customer Brochure (Printable PDF, Requires Adobe Reader )