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Fits Boxster or Boxster S with Bilstein PSS9 coilovers.
Running Boxster spec or SPB and don't want to hassle with other brands and their non-compatibility with the PSS9's?
Want to use the number one spring in NASCAR? MGC is proud to bring you SWIFT racing springs.
These springs are physically lighter than anything on the market and are sold in METRIC sizes (Bilstein utilizes metric springs).
This kit supplies you with the class legal 450-500 lb. rates you need.
These are a direct replacement for the PSS9 springs with 100% compatibility.
No machining of hats or spacers required, no loss of shock travel.