Hi man. i am totaly confused with all information i read here not on my main language, i want you to help me to tune my C32 amg, notice, that in my country i do not have such good petrol as in the USA, the our best is 91 octan and of cause not that quality like your, so i was told that there is no point to chip ecu. Now i want to do, no ECU chip needed, mechanical tuning. all i know it is that my g-timer from canada show me 5.07-5.3 for 0-100 км per h/. . and 1/4 mile for 13.35c, my car runs good and i feel that it does. all tune i have on it is KN filters in the stock places. and now i want to get code 3 C32 Intercooler Reservoir , Code Three Performance Belt Wrap Kit, and Performance Supercharger Pulley . but i am kindly scared of all your write here about, what your saggest?