My current recomendation is one of these : http://www.cg-lock.co.uk/ Keeps you well in your seat so you can concentrate on steering rather then hanging on. Unless you go for full on racing seats, a harness is not recommended, especially on a 3dr, as the extra strain in a crash can snap the seat back leaving your own back unprotected. TG P.s my apologies if this is teaching you to suck eggs but have a look here www.nurburgring.org.uk before tackling the 'Ring