Thanks. I'll take closer notice if it dissipates fully or not once fully warmed. I'm a little worried cause it's more prevalent now, than before. Hope it's not a spun bearing or something. Doubt it though. Full engine rebuild wasn't done THAT long ago, but who knows if it was done properly or not 
Unlikey it's a heat exchanger rattle. I'm running heaterless headers.
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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