Well, it's a sunny day in Tulsa and I thought I would finally replace the K&N with the 6637 filter I bought from Riffraff. I knew I would have to shorten the intake pipe but once I looked it over, I realized the 6637 takes a 4" pipe and my existing aluminum pipe is only 3" that's connected to my K&N. (See pic below) Where can I get a 4" pipe prevent that will work with the 6637?

Thanks

 

4" Pvc pipe, 4" exhaust tubing,

 

I went to a local muffler shop. They dug out a 4" 45° elbow from the junk pile and sold it to me for about $8.

 

As said, either PVC or 4" exhaust pipe. If you get PVC use thin wall instead of schedule 40

 

You are still missing the 3" to 4" factory boot.

 

I think the orange sleeve in the picture is a 3-4 " boot and my existing aluminum pipe is 4" on that end.

Robert

 

Will I have to remove the bottom of my factory air cleaner holder in order for the hood to shut with the RiffRaff 6637 filter?

Robert

 

Yes. removal is necessary.

 

Thanks for the great advice. Will the 6637 filter increase motor/turbine noise over the K&N filter? Especially interested in noise increase or decrease at highway speed.

Robert

 

It probably will be the same.