K&N Cold Air Intake System: High-Flow Air Filter, Increase Performance & Acceleration: Compatible with 2017-2023 Harley Davidson: (See Product Description for Select Models), RK-3956

This is very easy to install. Directions are in color. They are a little vague but anyone with common sense can figure it out. I have a 2019 Road Glide Special with a 114 ci motor. The air filter kit fitment was on point and excellent fit. The one thing you need to remember is to install the 2 long spacers to the new back plate before you apply the new back plate to the bike. These will have inner threads on both sides. One side to connect to back plate and the other side to use to hold filter. On my specific bike/year/model I did not need the 1/4 inch thick silver looking spacers. At least I think they were 1/4 inch. I could be wrong with thickness. Now on power and torque. I noticed a huge difference in Hp and torque. This kit woke my bike up! Plus it sounds a little bit louder coming out of my Rhinehart 4.5" slip on exhaust. I can't wait to see how much better she will run when I get her dyno tuned in a couple months. Now as for hitting my knee...... Well I'm 6'4" tall and the filter lines up with my calve instead of my knee. I didn't notice any difference from OEM kit as far as my calve hitting the new filter kit. I never hit it at all. Shorter people shouldn't have any problem at all. Now onto what I don't like about this air filter kit.This kit does not use any hoses for the oil return into intake . It's design is the return goes through pre drilled holes that go back through intake. This design is awesome but if you want to install a catch can or reroute that oil to dump out into a filter instead of it going back into the intake. You won't be able to do that unless you really know what you are doing or find a mechanic who can fabricate new holes to run outside of intake and plug the original holes that run into the intake. There is a guy on YouTube who did it with his trask air filter kit that had the same problem. Anyways, that means I have work in the future if I want my oil burps to go to a catch can instead of returning to the intake. So if you are planning on installing a catch can of some sort then this might not be the filter for you unless you are a mechanic or an imaginative fabricator.Next is I cannot find a sock that fits this air filter kit or a sock that is specifically made for this filter kit. I wish or hope that kn comes out with a sock for this specific kit. Also if you find a good sock please leave it in your reviews of the brand and where you got it so the rest of us can possibly purchase one for this kit.All in all I love the look and love the design. If it came with a sock and a catch can design, this would be the best filter on the market.

It fit my bike perfectly and look fantastic.

another quality product from k&n....while it didn't give me the magic powers i had hoped for, it did help my glide breath better...win some, lose some....

Fairly easy to install. It came with instructions for a 107. I have a 114 very similar. Improves throttle response that’s for sure! Gives a different sound to the bike. Kinda bulky though, my inner knee rests on it. Either way, it looks great.

It worked great on my 2019 road glide special 114ci. I have a ported and polished s&s intake and with same I did have to use the silver washers on the rear of the housing but worked great will be taking it next week to have dynoed since added this the cam exhaust.

I wasted $280 not getting this to begin with!I started with a K&N filter to replace OEM, then went to the Screaming eagle hi flow (basically just removes the black box around the air cleaner) and now i have this.Of the 3 this filter provided the most obvious and immediate improvement.The filter does stick out a little like others have stated, but another inch or two on the brake side floorboard and you're fine (plan on getting floor board extensions when I install a new exhaust anyway)My exhuast IMMEDIATELY got deeper and throatier on first start up post install, the throttle response is AMAZING now. Gas mileage-wise the tune I used for the screaming eagle filter is still good (Harley SE tuner state I canned map and an auto tune run of 15 mins/10miles).Overall DEFINITELY recommend, you CANNOT find anything for the M8 in my opinion that will provide as much bang for the buck.....If you told me I could pay $100 to increase my exhaust note and $100 to increase my throttle response, I'd do it in a heartbeat, if you're considering it....DO IT!ALSO, I think it looks BAD A$$ gives the harley a kind of muscle car look with how huge the cleaner is.

I love the way it's look and i noticed big difference on performance, it's took me 45 min they sent everything in the box shows you how to do every steps , it's well worth to money .

Nice fit excellent performance