twinhope88,
Full highway, i can go around 690 - 720Km per fill. Around 63liter of fuel used. during CNY with good traffic around town, i can clock 550km. My friend work in cyberjaya can get average 580km per full tank.
For city, is about 450km with 70% of the time are in traffic.
Supercharge is good if you can find the bold on like what being made in US. just control the boost.
You don't have to care about jpj, than insurance things.. here if you change engine even same cc, it can cost you around rm 300 - 500 depend of the runner you know. Or maybe below RM100 if you diy, but is lots of hassle if you don't know where about and what do to first.
Recently i do see some 25dd in few chop shop, but the price are pretty expensive cause is also rare now. Last i ask was about 5k without the body kit.