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[Debs.]

....for my `99 2.5 V6.: the motor factors list 2 types of the same brand with the same rectangular dimensions, but as best I can figure, the only difference is in the depth of the pleats and an additional stiffening/support rib. :-/

Was there a model year change of filter?.....or is the deeper pleated filter an engine-performance/greater-flow requirement for the later 2.6/3.2`s?

[Welung666]

There are 3 types Debs... Vx genuine, motor factors better quality and motor factors cheap sh!te. You'll be fine with the first 2 Avoid the 3rd option.

If you imagine the surface area difference between the deeper pleat and shorter pleat, which gets clogged up first?

[Andy B]

....for my `99 2.5 V6.: the motor factors list 2 types of the same brand with the same rectangular dimensions, but as best I can figure, the only difference is in the depth of the pleats and an additional stiffening/support rib. :-/

Was there a model year change of filter?.....or is the deeper pleated filter an engine-performance/greater-flow requirement for the later 2.6/3.2`s?

An OE filter is about £12 inc vat 
Omega      Part Number      Retail Price      Normal Trade      Trade Club
Air filters
All models      91149684      £16.00      £13.61      £9.92
 

[andyc]

yes only one listed for all Omegas

[Debs.]

Thankyou all!

[Elite Pete]

You should have said when you were here last Debs

[Debs.]

You should have said when you were here last Debs

  Next time; "ve vill examine zee lizst!"

[Varche]

I think the same must apply to pollen filters. My 2.5 has a meaty looking 3M filter but the 3.0 has a rather chatty looking paper thin Airflow one. 

[mathewst]

Varche there are two types of pollen filters.
Paper ones and carbon ones

[Debs.]

This why I asked:
The Coopers filter (AG1173) has much less depth and fewer pleats than the Wix (WA6621) and the latter has pleat-stiffeners; at both top and bottom...a much better quality item. (£8.90 inc. VAT)

[Jimbob]

Hard to tell with the scale but that wix looks viertually identical to GM

[Agemo]

Hard to tell with the scale but that wix looks viertually identical to GM

Yep, probably out of the same factory.