More advice from a former D-stocker: 
I think those Konis will help!   
 
Seat time!, even as a passenger (opportunity is back this year).  Something I did 2 years ago was run every chance I had, including Afternoon option for no points, & fun runs.  Yes, you'll use up tires faster, but if faster is what you want to go, then there's a cost to doing so.   
 
Also what has helped me was asking for advice from several experienced and fast drivers; not just 1 or 2, but from anyone who I thought drove well, and would spare me the time.  Do course walks with them and listen to what they have to say.   
 
Anyone who may want to run in D-stock this year (with potentially few other competitors):  I have my wrx 16" wheels in my garage, and I plan to offload them.
		 
		
		
		
		
		
		
		
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