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🏍️ Ignite your Harley’s soul with every breath — power, precision, and pride in one sleek intake!
The K&N Cold Air Intake System RK-3952 is a vehicle-specific, dyno-tested upgrade designed for 2008-2017 Harley Davidson models. It delivers a guaranteed boost in horsepower and torque by increasing cool, oxygen-rich airflow through a high-flow, reusable cotton air filter and custom heat shield. Proudly made in the USA, this intake system installs easily in under 60 minutes, enhances engine sound, improves throttle response for towing and daily driving, and is backed by a no-hassle lifetime limited warranty without voiding your factory coverage.
| ASIN | B07BHB1W8M |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #129,403 in Automotive ( See Top 100 in Automotive ) #392 in Powersports Air Filters |
| Brand | K&N |
| Brand Name | K&N |
| Customer Reviews | 4.7 out of 5 stars 222 Reviews |
| Fit Type | Vehicle Specific Fit |
| Global Trade Identification Number | 00024844367013, 02484436701300 |
| Included Components | 1 Air Filter |
| Item Dimensions L x W x H | 12"L x 9.5"W x 3.75"H |
| Item Type Name | Intake System (Harley Davidson) |
| Item Weight | 3.88 Pounds |
| Manufacturer | K&N Engineering |
| Manufacturer Part Number | RK-3952 |
| Manufacturer Warranty Description | 3 Months |
| Model Number | RK-3952 |
| Number of Items | 1 |
| OEM Equivalent Part Number | 77-2557KP |
| OEM Part Number | 77-2557KP |
| Product Dimensions | 12"L x 9.5"W x 3.75"H |
| Product Grade | Performance Part |
| Shape | Oval |
| UPC | 024844367013 |
| Unit Count | 1.0 Count |
H**R
Worth Every Dime
I replaced an Arlene Ness Big Sucker with this K&N and it was worth every dime. Way more air flow and a significantly noticeable increase in power. Instructions were a little vague but it wasn't that hard to figure out. Looks good and it gives the desired effect.
P**S
Great breather for my Harley Roadglide
Ive tried a few different breathers on my 2015 Harley Road glide and when this was on sale i had to try it. Install was straight forward with clear included instructions. Parts are quality made and thought went into engineering this to fit perfect. Fit touring Harleys really well. This is my favorite to date. Included pictures. Kit comes with a K&N decal and a emission decal/ tag if needed for your state Inspection. Highly recommended.
G**S
Feels solid
Looks good, feels solid, half the price of others, need to get it installed and bike tuned but excited for the future
J**S
Improvement in performance
Definate improvement in performance , cosmetically I would like chrome, but its okay.
K**O
Perfect
Pulling a LOT of air, I love it! Don’t forget to tune your ECU to give more fuel or you’ll run hot (lean).
T**M
Performance
A noticeable power difference! On my Ultra Classic definitely money well spent !
L**T
K and N filter assembly
Was reluctant to change screaming eagle assembly but this filter met all expectations. I put bike on dyno and I gained 8.5 horsepower. That's a phenomenal gain! Very impressed!
C**R
K & N products never let me down
perfect fit, looks and performs great!!
J**.
Perfecto para Softail Deluxe '17
Perfecto para Softail Deluxe '17 Intrucciones claras sobre como instalar, tener en cuenta que al modificar sobre un filtro stock, puede necesitar remapeo la moto Tambien recomiendo buscar el rain sock de la marca filter wears, ya que el que recomienda amazon para esta publicacion le quedo corto
S**Y
Parfait
Fit comme un charme.
A**R
Great product fast shipping
Great product fast shipping
O**.
Muy buen producto
Se ve increíble en la. Moto
B**M
Dont hesitate buy it you wont be disapointed
Increased my harley ultra classics horsepower gices it a little.rumble what more can i say great work K&N .very easy install
Trustpilot
3 days ago
1 day ago