Hope I can rev up this thread: as I mentioned earlier I have installed IPD, 82mm TB, K-N filters and FVD tune. I'm hoping a technically minded Porschite can jump in. I would like to add street headers because I don't want the stink. My first choice would be the FVD street headers w/200 cell cats. Too much $ for my pocket book even though FVD will upgrade the tune at no cost. My second choice would be Soul Performance of the same variety however, FVD will cost me $500 for the software upgrade because its not their product. I get it.
I've done enough homework to know that the biggest restriction in the exhaust laminar airflow is the cat. Both use the same 200 cell cats. I expected to pay more money for Porsche upgrades when I bought the car but, still try to make intelligent decisions to save money. If I go with SP + $500 I will save some money. If I go with no software update I save more $.
My million dollar question is: given that I already have the software update to go with the plenum and TB, what would I really be gaining in a software update to accommodate a set of headers. In my feeble tight a$$ mind I'm thinking, hell, do I really need the second software update? It can't make that much difference anyway. Or can it?
I could install the SP headers and if the 200 cell cats throw a CEL? Ok FVD, I give. You win. LOL TIA dlb