2001 Boxster S Sport suspension replacement

[autodoctor911]

I think you have the right idea in going to us 030.

the springs should be approximately the same stiffness as your RoW but 10mm taller.
I looked at the specs and the wire guage is slightly greater, and coil diameters are the same on us and RoW M030, but the USA M030 has a 1/4 turn more coil, which will increase the hieght with similiar spring rate.

all you should need is a set of springs, which should run about $440 US from the porsche dealer.
the USA M030 and RoW M030 ARBs are the same
the USAM030 nd RoW M030 dampers are different:
usa:front:986 343 041 31 row front: 986 343 041 30
usa rear: 986 333 051 31 row rear: 986 333 051 30
I guess the damping rates and possibly the actual internal lengths are different.
I know it would not cause any issues for driving, since it would probably just be slightly stiffer damping, similiar to going to bilstien sport or bilstien HD aftermarket dampeners with a US M030 car. I don't know what your insurance might do. How will they even know you changed the springs? especially if you rub the color code off(two colored dots that look like they are made with a paintbrush), which I doubt they could identify anyways.

I am also looking to get a set of USA m030 springs for my stock class autocross car. I could probably get away with the RoW springs, but I better keep it legal and get the right ones. right now I am running H&R's which sit about 20mm lower than the standard(10mm lower than RoW M030) which are definitely illegal in stock class(I painted them flat black, hoping no one will notice)

I was just wondering when you are having ground clearance issues? I have a steep driveway, and even with the H&Rs which should be 10mm lower still than your M030RoW, I have been able to just use a good angle to avoid scraping.
Do you also have the aerokit?

[blue2000s]

How much higher do you want to go? It's common practice on Subarus to add a shim between the strut and the body to raise the rear of the car (saggy butt spacer). I think it would probably be pretty easy to get a pattern and have some spacers made for your car. But you want to make sure you still can get the strut threaded onto the body so that might limit the height you could go. Definitely less expensive than replacing suspension parts.

[Cloudsurfer]

The RoW M030 sits lower than the US cars do, and is sprung stiffer and more damped. I had installed this setup on my 02 S (which comes with springs, dampers, and sways) and it was an extremely well balanced car with it installed.

If you want to raise the ride height, just swap out the springs. However, depending upon your mileage, it may make sense to replace the dampers as well.

[jaykay]

I have always wanted to know of anyone's experience with RoW M030 package and swapping out the RoW M030 springs for ones that give a slightly lower stance....perhaps H and R.

I would hate to mess with a good set up but would like the look of the lower ride height