Anyone ever cut up a K&N air filter

[Skyedriver]

Looking to adapt a K&N air filter on a project but it will need to be cut & shut.
Thinking a 1mm blade in an angle grinder along one of the pleats, anyone ever tried it or tried cutting around the circumference to reduce height.
Just one of the many weird ideas that pass through my idle brain.
thanks

[DanielSan]

You can buy K&N filters in just about every size you'd ever need. Why bother cutting one up?

[Dave.]

DanielSan said:

You can buy K&N filters in just about every size you'd ever need. Why bother cutting one up?

^

https://www.knfilters.co.uk/dimsearch/

[Skyedriver]

DanielSan said:

You can buy K&N filters in just about every size you'd ever need. Why bother cutting one up?

It's a long long TL:DR story......

[Raccaccoonie]

and high probably of bits going into the engine. Sounds an absolutely moronic thing to do.

[PositronicRay]

I have made my own air filters, one was cut a cut down foam filter. Spent ages at a motor factors finding the correct dia. Also you can buy sheets of filter foam, intended for flat panel filters, but I've cut shaped and glued them.

I used wire mesh to support the filter inside the housing.

Edited by PositronicRay on Sunday 2nd April 08:50

[eliot]

can post a picture of the filter explaining where you want to cut it.
I’ve done it, but it was a circular filter for a 4 barrel carb, there was a metal strip joining the circle, so just opened it, cut 1” out and reattached

[Skyedriver]

Raccaccoonie said:

and high probably of bits going into the engine. Sounds an absolutely moronic thing to do.

Good point and worth noting.

[PhillipM]

Why wouldn't you just cut it with scissors/shears?
Your biggest issue is then rebonding the edge that's now open and creating a seal on that edge.

[Skyedriver]

PositronicRay said:

I have made my own air filters, one was cut a cut down foam filter. Spent ages at a motor factors finding the correct dia. Also you can buy sheets of filter foam, intended for flat panel filters, but I've cut shaped and glued them.

I used wire mesh to support the filter inside the housing.

Edited by PositronicRay on Sunday 2nd April 08:50

That could be the alternative option

[Skyedriver]

eliot said:

can post a picture of the filter explaining where you want to cut it.
I’ve done it, but it was a circular filter for a 4 barrel carb, there was a metal strip joining the circle, so just opened it, cut 1” out and reattached

Haven't got one yet, it's for fitting in a difficult location.

[Skyedriver]

PhillipM said:

Why wouldn't you just cut it with scissors/shears?
Your biggest issue is then rebonding the edge that's now open and creating a seal on that edge.

Thought of that - high temp silicone/JB Weld etc

[egomeister]

Raccaccoonie said:

and high probably of bits going into the engine. Sounds an absolutely moronic thing to do.

That's pretty standard for K&N anyway in my experience