73.5 - 83 911 had the exploding airbox cause by CIS cars backfiring. Fix was to install a pop-off valve to vent the pressure.
If anyone has one of these cars w/o the pop-off you should install one ASAP.
Pelican and probably Performance Parts should have them.
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Mike
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970
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