

⚡ Upgrade your engine’s breathability — because your ride deserves the best!
The K&N 21512-1 Air Intake Adaptor is a precision-engineered, vehicle-specific component designed to fit 6" filters with a 3.5" coupler. Measuring 5.94" square and 2.25" thick, it weighs just 6.3 ounces and features a durable painted finish, ensuring both performance enhancement and long-lasting reliability from a trusted automotive brand.
| Brand | K&N |
| Product Dimensions | 5.94"L x 5.94"W x 2.25"H |
| OEM Part Number | 21512-1 |
| Global Trade Identification Number | 00024844263056 |
| Shape | Round |
| Manufacturer | K&N |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 024844263056 |
| Model | Adapter; Universal, 6" Filter 3.5" Coupler |
| Item Weight | 6.3 ounces |
| Item model number | 21512-1 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 21512-1 |
C**O
Adapter
Good quality n perfect for my car
N**N
Don't buy
Very inaccurate description, to return it will cost you almost as much as you paid for it for the shipping
H**I
Great
Great
A**N
As advertised
Works great
R**N
Bought wrong adapter, gave to a friend. He ...
Bought wrong adapter, gave to a friend. He loves it, with the K&N filter I bought. He gets improved MPG and throttle response
N**R
Paying for that K&N quality
I mean it works, just way overpriced coulda made a better mount for the price of this.
J**P
Five Stars
Yup! Exactly what I needed to reduce the piping and bolted right up to the K&N heat shields
M**N
Five Stars
Works just fine for my K&N filter. 3.5" OD outlet.
Trustpilot
2 days ago
1 week ago