hallo mate,i ran my 3dr for a while with stu's stage 3, holding 22psi,standard cr,but did have
500 cooler
breather system
t34/63
but main engine was standard and coped realy well,stu tells me you can live map at 28psi on grays,you know where to go mate,but seriously stg 3 is fine on the road

cheeRS stu