What is the largest K & N Filter to fit rear quarter panel?

Joined
24 November 2006
Messages
501
Location
Florida
Hi Guys my car is supercharged & Im going to run a custom 4"pipe to the factory opening in the rear quarter panel .I am trying to run the largest K&N Cone style filter possible in that space .Has anyone done this yet I dont want to go with the scoop set-up.Any pics or suggestions or if someone knows who has done this what is the largest filter that will fit in that space.
 
Re: ??What is the largest K & N Filter to fit rear quarter panel

Yes, I've got a huge K & N filter in my quarter panel. I'll have to check the part number for you.
It has a 4" inlet but you can't get a 4" pipe through the hole in the engine bay.(unless you open it up. I've used a 3.5" alloy piping from the Turbo to a silicon hose in the hole which is a perfect fit & takes the shape of the hole(not quite round) Then I stepped up the 3.5" alloy tube into the 4" air filter.

I'll get the part number of the filter tomorrow. & try to get some photos.
 
Re: ??What is the largest K & N Filter to fit rear quarter panel

K & N part number is;

RE - 0870

I use a 90 degree 3.5" alloy bend with a small piece of 4" tube welded around the end of the 3.5" tube to fit the filter. That seems to fit perfectly up to the 3.5" sillicon hose through the hole in the engine bay.

I'll post some pics when i get a chance.
 
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