Heres what i know from Jake told me, if you need info call him.
Ally sleeves, you can use part of the lower spring seat as the locator of use a "weld-on" metal ring and grub screws as the locator.
Spring rate hes unsure of, but you can use a spring rate calculator off a ggogle search to find the approx rate. They are a WRX kit but will suit 50-52mm strut, they were to go on his 1200 coupe.
Brand, not sure (call him thought maybe bilstien springs, and everything else was made up to suit). I know he paid $220 a pair not long back from GSA.
Theyre quite good build quality.
Sandra
