447 pound but for total price $250 I can supplie and 8" spring with rate from 1kg to 18kg
1 (kg / mm) = 55.9974146 pounds / in
2 (kg / mm) = 111.994829 pounds / in
3 (kg / mm) = 167.992244 pounds / in
4 (kg / mm) = 223.989658 pounds / in
5 (kg / mm) = 279.987073 pounds / in
6 (kg / mm) = 335.984488 pounds / in
7 (kg / mm) = 391.981902 pounds / in
8 (kg / mm) = 447.979317 pounds / in
9 (kg / mm) = 503.976731 pounds / in
10 (kg / mm) = 559.974146 pounds / in
11 (kg / mm) = 615.971561 pounds / in
12 (kg / mm) = 671.968975 pounds / in
13 (kg / mm) = 727.966390 pounds / in
14 (kg / mm) = 783.963804 pounds / in

What do you mean by '8kg'?

Are they somewhere around 200lb - 225lb - 250lb?

No they don't fit stock 1200 struts, sorry!
I have washers and coilovers in stock now

Hi. I race a 1200 in SCCA's HP class. Wondering if these kits will fit a stock 1200 strut and how much you get for them. Will also need the weld-on washers you are speaking of. Thanks.

In stock NOW

Yes will be able to supply a weld on washer to suit

I'll cheak I may have a weld on washers to go with the kits just have to measure

You could weld a collar around the strut tube so the sleave doesn't travel Downwards and usually they have grub screws at top to secure them. Can set that then add another collar at top if you so wish.

I have a set very similar no issues since 2008

Ah really... Was thinking about one of these, how do you attach the aluminium sleeve to the strut? I was thinking welding until I saw they were aluminium.

Yes