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.
A raft of changes to Formula One's regulations has been decided upon by the FIA's World Motor Sport Council (WMSC), in order to improve racing and tidy up a number of loose ends.