of engine
u can change air filter (K&N o open pod like apexi's)
denso idrium spark plugs
lightened & Dampered Crank Pulley
Port n polish
Performance Cam shaft
Adjustable Cam Gear
form work exhaust system (4-2-1 til the end :P)
today i read newspaper which information from brunei just launching the evo9 wagon model which engine spec almost like evo9 too only the power performance bit different and photo will be post soon!!!!