just relaised we all completely missed the point of this post

a SERIES 2 RS TURBO has hardened valve seats so does NOT require leaded fuel/LRP/Lead Additives

ie you can run it on unleaded fuel without risk of damaging the head

i THINK some of the early S1s might not have this done, but i dont know for sure (ive forgotten )

also LRP is SHIT far better off using unleaded fuel + lead additives