What can you do to your 1989 Mitsubishi lancer to increase hp and speed and what are the modifications suited to your car?

if you have EFI engine, replace your stock intake, headers, exhaust. installing racing filters improves air intake which can add power to your engine. replacing your stock headers and exhaust pipes with custom headers and mufflers can eliminate back pressure. doing this upgrade can give you additional 10 - 20 HP.