Mitsubishi Outlander 2 2012 4n14 engine pipe issues

Hello there just helping out on what pipes to look out for ,, I've had all my pipes split on me ... mind you the car has done 137,000 miles now balance shaft has completely been removed DPF even after a regen forced clean at a garage still keeps these engines underpowered and Like I say this car is supposed to be working for me .. not me working for the car