hi

my friends scoob got some problems, the rev doesnt goes up as fast as before and when the turbo kicks in, the power is not as powerful as before, there are no smoke or overheat from the engine........ feels like the car is driving very hard, there are no weird noises from engine too.... will it be the MAF or Lamba sensor????.......please help

here are the following spec :

1994 WRX

standard turbo
magnex downpipe
magnex de-cat
magnex back box
K&N cone filter kit...

thanks guys

 

He has got used to it.........

 

so is there anything wrong with his scoob????