rs turbo exhaust valves are sodium filled (n/a cvh's are nimonic)

8.3;1 comp ration (n/a 9.5;1)

secondary oil rings are tapered

beefier gudgeon pins

main bearings are uprated from xr3i spec

retarded cam timing by the fitment of a 1.3 cvh cam sprocket

sump had oil return

xr3i and rs turbo k-jet and ke-jet are the same the E in the ke only means electronic control of the cold start valve and period