stage 2+ cone filters and maf

[cwspellowe]

OR.. and this is more likely.. Peugeot threw an engine in and thought "aw crap, that's a bit awkward, someone smash a bit of pipe up until it fits. As long as it still works that's fine by us.

If you seriously think it was designed that way on purpose why do you think as many turbo applications as possible DON'T have an inlet like that? A sharp bend can be negated in terms of airflow by rifling the inside of the pipe but this to me just looks like it's been crushed to squeeze in the gap. The cross sectional area of the pipe clearly shrinks, then expands again after the bend to meet the mouth of the compressor.

The best design possible for an inlet is the longest, straightest bit of pipe you can find. Just because noone's done "extensive testing" on the HDi pipe doesn't mean it's not a poor design...