First tech story on dual quiet-packs was in the April 1979 issue of Hot VWs (page 38...).
BUT first appearance was on my former ex-Keith Goss chop-top way back in 1976... engine produced 20hp more than with a single quiet-pack.
![Smiley](http://cal-look.no/lounge/Smileys/default/smiley.gif)
Oh, and let's not forget the sound. NOTHING sounds as good as dual quiet-packs.
![Grin](http://cal-look.no/lounge/Smileys/default/grin.gif)