thank you mrnazmi for enlightening dat up, like i said, no problem as long as u r using the original engine. ive checked and asked so many times to the jpj, and their response was like "kalau tak tukar engine takpe". dis statement was led because they dont have a clear guidline on how much modification can be done to keep the car street legal. can u change to a higher compression pistons even with the same bore? can u change to a better flow air filter? how much is the maximum gain in horse power allowed if any modification is done? questions like dat are the few examples that they cant answer clearly, loop holes if u must. loop holes dat are very good for us imo