986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - 2001 Boxster S Sport suspension replacement

autodoctor911 · 05-13-2011, 02:40 PM

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?

05-13-2011, 02:40 PM	#5
autodoctor911 Registered User Join Date: Jul 2010 Location: austin, tx Posts: 64	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? Attached Images Last edited by autodoctor911; 05-13-2011 at 03:09 PM.