I have the SSI's and the Dansk sport muffler in my 78 911 SC. The muffler tail pipe fit the valance cutout perfectly. It is not too loud and develops a gorgeous primal scream from 4000 rpm up. I rebuilt the engine non stock. PMO's, Web cams solex grind, J&E 9.5 to 1 domed pistons, Re-plated nikie cylinders an the SSI's and Dansk.
Cheers,
John
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