What's the best to install in my Proton Wira 1.6XLi A/B (A). Half cut of 4G91 DOHC Auto or Half cut of 4G92 DOHC AUTO. Any problem on my car if I downgrade to 4G91 while using 4G92 chassis? I just use my car for normal city driving.
my question is,the 4g15 with siemens ECU can be matched with high cam?i think it does need a piggyback to fine tune the fuel.so does this kind of mod possible?need ur expert advice.