So had rear tyres changed today and while the car was in the garage i had the guy lift it for me to check the exhaust system, so i have sports cats with stainless y pipe, no idea of make but y pipe has flexi bits, would assume they are possibly japspeed, anyway from the y pipe the exhaust is like a custom job, not stainless, the guy said it was mild steel treated with aluminium stuff? with stainless back boxes, so i want to replace from the y pipe back, my options are cobra reso or non reso or scorpion, bearing in my the other mods can anyone suggest which would be most complimentary.thanks