all the while you can increase more than 25%. the approval was done in JPJ HQ, unlike less than 25% any branch can approved it... but nowadays the dun approved proton conversion more than 1.8cc since proton never produce wira/satria/putra with 2.0cc... (good news to vr4 owner.. hopefuly spare parts price getting cheaper..heheheh...)
if you aredi registered your 4g63, why should your afraid? if they asked who approved it asked them to check their file lah, and asked them to whacked the officer who inspect it and signed the approval letter... i dun think they gonna do that coz maybe him or their fellow officer who approved it in the first place...