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)
Here's some collection of links to informative thread and discussion posted in the MLOC forum, for the benefit of new comers and quick reference instead of search. All contributions from MLOCian and fellow ZTHian...