K&N filters have good reputation... I used 3 K&Ns on XKE triple carb manifold.

https://mossmotors.com/222-955-chrom...-su-1-3-4-deep ...shop around, you may find a cheaper supplier.

Rgds
David

 

Depends on who you ask! Years ago on the Jag lovers lists, one of the members was a professional mechanic and ran a small race team. He built a pair of identical engines for the season, and equipped one with a K&N filter and one with an OEM paper filter. Everything was measured and recorded in the build.

When the engines were torn down after racing, the one with the K&N had measurably more bore wear than the one with a paper filter and higher silica in oil analysis, indicating that the K&N's allow a lot more dirt into the engine than a paper filter. His conclusion was that K&N's only kept out "boulders".

 

K&N is a typical example of poor filters other than those made for them by Mann to Mercedes Spec in blown polyester in Germany.

With K&N it is generally pure marketing. Purple rubbish.

 

I was contrasting the pancake foam filters, verses the K&N .... other manufactures don't make filters for one off short filters for SUs with tight space requirements. I am in agreement, if you do weekend figure 8 racing on a dirt track, you might want the best filter available.
Rgds
David

 

K&N do not make good air filters. I'm a Tribologist for a supermajor Oilco & we have tested them all.

The standard Jaguar OE filter is vastly superior or if you use quality filters like Mann.

 

those thin spanners usually are supplied with furniture items like bed frames. Usually 12, 13, and 14mm, very thin but hard metal.
A furniture dealer friend gave me a bag full of those and I found a 14mm one to fit and release the nut behind and between the floor vent knobs of my S type in order to pull the cable.