i just install the latest cool air intake suction cool air from air-corned pipe
in the engine to the vacumn tube.this system is from USA call
POWER JET-SPEED UP.it can give the maximum rev all the time cause
it supply the 18 degree cool-air to the engine even though in the
afternoon,i am sure it will lost power in the afternoon,but after install
it ,it can maintain the performance all the time.