Stay away from the d2 and k sport anything really cheap you get what you pay for typically. I have seen the K sports leaking after a relatively few miles. I have been running the KW V3 for many years and like them a lot, I would also recommend the PSS9 or Koni kit
Or even just H&R Race springs and Koni yellows that always been a good set up.
My rides a 2002 SVT track car, & Boosted 2007 ST with the SAP.
The helmet has a special meaning for many drivers. How important is it to you? - It protects my head.
Do you have any special rituals when the helmet is concerned like many have? - I wipe it so that I can see better.