Any sifu here got any recommended shop near seri kembangan to install evo x spoiler ?

Any sifu2 here experience problem like this before ? When waiting for traffic the rpm just go up and down whenever the 'tak' sound came out ? When chg to D/R the rpm will just drop till nearly 0.5k ? Sometimes the engine can even stall when reversing

But sometimes engine like going to stall the feeling is abit similiar to clutch release too much when driving manual

I heard remap twice will double the effect same logic with installing 32bit window twice to get 64 bit