The knock link is a good idea. in your non boosted boxster do you see allot of detonation?
I always assumed a healthy engine did not have a detonation problem, but as said in another thread modifying your car you get a PHD in tunning real fast.
The type of gauges you mentioned are the ones I was thinking about (Boost, AF, oil pressure and EGT). I just need to solidify my mounting options to keep the car as "could have come from the factory" look.
I am leaning toward prosport peak and hold in amber
http://prosportgauges.com/premium_series_peak_warning_gauges.aspx
Before I buy them I need to ensure that the bezels can be painted and the illumination can be reduced. I dont want a bunch of bright gauges flashing at me, I want them to blend in and appear OEM.
I may mount the gauges in the slot where the ac control is or in the boost gauges current location in the top storage bin.
What do you guys think of these mounting options?