63-1125P - K&N Intake Kits, Performance Intake Kit direct from K&N

K&N 63-1125P
Intake Kits > Performance Intake Kit

Your Price: $456.78

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K&N AirCharger Air Intakes for select Harley-Davidson® Touring, Softail, Twin-Cam and Sportster motorcycle models increase power by eliminating the restrictive stock OE air cleaner and replacing it with a K&N High-Flow Air Filter and mandril bent aluminum intake tube. These intakes comes with a billet aluminum throttle-body mounting plate and mounting hardware. K&N High-Flow Intake Systems gives your Harley® an aggressive appearance while providing a significant increase in airflow resulting in more power. These K&N air intakes are street legal in most states. They are not legal for use in California and other states adopting California emission standards. [MORE]

Available Information

Installation Instruction Sheet

Dyno Chart - 2009 Harley Davidson Softail - 10.21hp

Dyno Chart - 2006 Harley Davidson Softail 88ci - 7.78hp

Installation Video

Features Video

News Story - Harley Davidson Softail Motorcycles Get Added Power from New Air Intake

63-1125P Vehicle Applications

Part 63-1125P Product Specifications
Product Style: 63 Series Aircharger Kits
Estimated Horsepower Gain: 7.78 HP @ 4953 RPM
Replacement Filter: RC-3680
Street Legal In All US States: No
TUV Approved (Europe): No
Clamp Style: Regular
Intake Pipe Color / Finish: Polished
Alternate Replacement Filter: RE-0960
Weight: 3 lb (1.4 kg)
Product Box Length: 11.75 in (298 mm)
Product Box Width: 9.5 in (241 mm)
Product Box Height: 4.88 in (124 mm)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Accessories

99-5050 - Filter Care Service Kit - Squeeze

RC-3680 - Replacement Filter

RC-3680DK - Air Filter Wrap

Product Reviews Review part 63-1125P

Dear sirs:

All I can say is most people won't believe this but then it's their loss...in miles per gallon that is. I Own 2 Harleys, a 1979 HD Sportster that several years ago I put a K&N air filter on and felt like it doubled it's performance, and a 1999 FLSTF Fat Boy. I didn't rest there, as a year ago I put a K&N on my 2001 Dodge Ram Quad cab Cummins turbo diesel and also felt the increase in performance not to mention the scream of that turbo that I had never really heard from the factory.

Recently two of my buddies and I went on a motorcycle trip to Stecoah, N.C. Before going on the trip I changed all my fluids and serviced the whole bike. I decided to buy a K&N air filter and pitch the stock one. They were riding a 2003 Honda Goldwing, a 2005 Harley Davidson Roadking and I took my 99 Fat Boy. Prior to installing the K&N my Fat Boy got between 40 & 43 MPG. As we went from fuel stop to fuel stop my mileage was as follows: 43 MPG, 47 MPG, 46 MPG, 48 MPG and 52 MPG EVERY tank after that. My buddies only mustered 44 -46 MPG. Most people would ask what about the weight and the speed. Well both my saddle bags were packed, I had a bag with 20 lbs. on my luggage rack, plus my TBags weighed in at about 50 lbs. The weight we carried was all about the same. The motorcycle weights were different, but not enough to warrant the major difference in MPG. Also mine is carbureted and theirs are fuel injected. As far as the speeds, we were cruising on the interstate at 70 to 80 MPH through a whole fuel run which was about 200 miles. Even when I was on the tail of the dragon, which is 318 turns in 11 miles, my mileage stayed at 52 MPG. All I can say is after over 1700 miles on that trip the K&N definitely paid for itself with the increase of 9-12 MPG.

So everyone has a choice. you can pay at the pumps or spend that money on the LAST air filter you will EVER buy.
Ronnie E., Glen Rock, Pennsylvania

Coming from Southern Calif. as I do I have been a big fan of K&N air filters for a long time and today was no exception. I just finished installing the RK-3909 air cleaner/filter kit and I must say I was not only impressed with the hardware and the way everything went together and fit perfect but the step by step instructions (with photos) were great. You see writing instructions is something I know a little about as a retired aerospace Mfg. Engineer I wrote instructions for the guys making the parts as well as putting together of rockets and all types of aircraft.
2007 Harley Davidson 96ci Softail Model Nightrain
Well done and thank you,
Lee Champagne, Orcas, Washington

My 2008 Colorado Crew Cab was great - until you had to put your foot in it and pass someone. I had always heard good things about K&N and the benefits to horsepower and acceleration. The filter to fit my vehicle's 3.7 liter engine had not even been released yet, but I told my local dealer to order it as soon as it was available. The difference in performance was immediate. The acceleration is now everything that it should be, and is completely responsive to what I need it to do. I have become an advocate for K&N and recommend them anytime I get the chance. A friend didn't hesitate in taking my advice when it came to upgrading his new Harley Davidson Dyna Glide! Kudos on a job well done!!!
Gary Lewis, Memphis, Tennessee

K&N 63-1125P fits the following:

2013 HARLEY DAVIDSON FXS BLACKLINE 103 CI - Exc. lower fairings