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914-6 GT | profile | all galleries >> The 914-6 GT Project >> 906 Twin-Plug Racing Engine #1 (The GT) >> 906 / 914-6 GT Twin-Plug Heads tree view | thumbnails | slideshow

906 / 914-6 GT Twin-Plug Heads

These are the very illusive factory 906 Twin-plug racing heads https://pbase.com/9146gt/image/37944260 The heads feature large 45mm intake ports https://pbase.com/9146gt/image/39255414, 39mm exhaust ports https://pbase.com/9146gt/image/39255426 and valves https://pbase.com/9146gt/image/39255416 that are nothing less smaller. The Porsche 906 racing heads come in a twin-plug configuration and use the smaller 12mm competition spark plugs https://pbase.com/9146gt/image/23654089

The heads are almost done https://pbase.com/9146gt/image/99979821, the last step in the restoration is lapping valve seats, installing the correct factory ATE valves, new springs and retainers and these will be done. More photos to follow.
906 - Porsche Factory Twin-Plug Head, OEM, NOS
<< 906 - Porsche Factory Twin-Plug Head, OEM, NOS >>
906 / 914-6 GT Twin Plug Heads - As Purchased
<< 906 / 914-6 GT Twin Plug Heads - As Purchased >>
906 / 914-6 GT Twin Plug Heads - Before and After
<< 906 / 914-6 GT Twin Plug Heads - Before and After >>
906 / 914-6 GT Twin Plug Heads - All Heads Individually
<< 906 / 914-6 GT Twin Plug Heads - All Heads Individually >>
The Valve Job
<< "The Valve Job" >>
906 Twin Plug  Racing Heads (Machined for 92mm RSR Cylinders)
<< 906 Twin Plug Racing Heads (Machined for 92mm RSR Cylinders) >>
Other 906 Twin Plug Head Photos
<< Other 906 Twin Plug Head Photos >>