Between $5k and $10k is my estimate. Probably close to $10k including the PIWiS 3.

BTW-. Did you finally get to your front suspension leak? I'm afraid/confess mixing procedures did work fine after all. I know you were concerned I'd run into problems. My big tips-. Change the upper control/trailing (Porsche name) arm with the front air strut. So far I'm happy with the Duralast arm that I sprayed bushings with Si lubricant repeatedly prior to installation. They are most likely bad. I would invest in 4 of those $100 motorcycle lifts to hold up the suspension and not let them dangle. I eventually bought a total of three but I'd recommend four. Not sure about Nitrogen filling. The procedure is different for the Arnott and hence it doesn't match up with the Porsche installation instructions. Best bet after installing get the dealer to replace air with N2. (I replaced a non-leaking original strut and was able to shift the air without loss, tool Foxwell NT510 Elite with Porsche software).
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A friend who is a lead mechanic at the Porsche dealer did the work for me. My vehicle was at the dealer.

- upgraded thermostat housing
- replaced the two front air struts using Porsche parts
- PDK oil service
- bushing this and that
- AOS
etc....

I just paid $3800 for parts.

 

Hi Nikita4ever,

Actually you got the good deal with Porsche mechanic from the dealer by doing a side job. Are you in sacramento? Niello Porsche is good, i bought my 2014 pan4 there. I may need to ping you privately to introduce me to your Porsche mechanic.

Thanks.