93 octane fuel. Engine related mods are as followed: AEM CAI, Perrin Turbo Inlet, Invidia Divorced DP, Greddy Evo 3 Exhaust, HKS Equal Length Header, Grimmspeed EWG Up Pipe, Tial 38mm EWG, ID1000cc Fuel Injectors, DW65c Fuel Pump, Cobb 3 Port EBCS, Cobb LF Bypass Valve, Cobb Accessport V3, NGK 1 Step Colder Spark Plugs, IAG Timing Kit, IAG Stage 1 Oil Pump.