It'* kind of hard to hear anything over your IAC through the first 60 seconds of the video. But I did hear some ticking @ ~51secs, it'* pretty hard to diagnose in the video but although it annoying it'* normal.
I looked on ZZP’* website to try and find out what gauge the piping on the PLOG is but I couldn't find out. I have noticed louder ticking at idle with the SLP headers (16 gauge steel) vs. my TOGs that are 14 gauge. The cast manis are pretty thick so pretty much anything is going to make valve train noise more audible.
1998 SSEi The Executive Hauler
Built Trans w/ 3.29s, P&P Jenny 5, S1X cam, Silver TOGs, Northstar TB & LQ4 MAF, FWI, Dyno tuned, #60 injectors,Oil Pressure Kit, 2.9-3.4MPS, MagnaFlow exhaust, 3" HF cat, MSD Coils & 8.5mm Super Conductors, AeroForce, only Sunoco 94, 100