racingrich

I have a 1999 Boxster with all of the Boxster Spec parts including the PSS9 coilovers, GT3 swaybar, third radiator etc. I love the car, but age is catching up with it. I am thinking about upgrading to the 987 generation. What parts, if any, can I install on 987 boxster and/or cayman?

PGas32

Bringing this way back from the dead because I have the same question - will PSS9s off an 986 fit on a 987? Bilstein has different part numbers, but the dimensions are the same so I'm wondering if the only difference is the spring rate?

steved0x

I was going to try it, the strut bottom diameters are different on both but there are adapter sleeves that can fix that, the tops are the same, but the heights of the pinch bolt are different. Here is my thread of 986forum where I was thinking about it, and ultimately decided not to do it, and then at the end of the thread someone had some info about height differences:

http://986forum.com/forums/performan...ers-987-a.html

If you download the install manual for Ohlins Road & Track, which has independent height adjustment and spring load, and which can be used on ether 986 or 987, you can see the differences in the heights by looking at the spring load setting and height adjustment differences between 986/987

986 front - 15 mm of spring load and 80 mm between lower spring collar and height adjustment collar
987 front - 2 mm of spring load and 59 mm between lower spring collar and height adjustment collar

986 rear - 15 mm of spring load and 130 mm between lower spring collar and height adjustment collar
987 rear - 2 mm of spring load and 105 mm between lower spring collar and height adjustment collar

The PSS9 doesn't have the lower independent height adjuster and so all the height has to be done by moving the lower spring collar and it might take the strut piston out of the sweet spot in the middle and to where it is topping or bottoming out.

If that can be solved, MCS will sell the sleeves to adapt the strut bottoms.