Freelander 2 (LR2) Silly Question - Air Intake

My early FL2 has 4 pipes coming frmo the Air Intake (under the bonnet at the back) - later models don't.

What are they and why were they removed?



M

They were to even out the airflow, all to do with the distance of the inlet ports from the turbo

My only question is now: does my 2007 HSE have a DPF? I have no idea.

I'll have to research it... see where it is.

It was an optional extra I think.

Optional on that age of car - one of the VIN characters changes for DPF/non DPF

Enter details in to TOPIx and it should give you vehicle spec info

Thx Bud.

Lotus-Max said:

My early FL2 has 4 pipes coming frmo the Air Intake (under the bonnet at the back) - later models don't.

What are they and why were they removed?



M

Click to expand...

The 4 pipes are induction resonators. They can also be known as Helmholtz resonators. The primary task of induction resonators, is to reduce induction noise. In a NA engine, they can be turned to aid the induction cycle and boost torque. However on a turbo engine they don't reduce noise much and make no difference to the torque at all. Nearly all cars after the mid 80s had some kind of resonator in the induction system. More moderd engines are moving away from them. Mostly due to the little effect they have and the added cost of incorporating them.