SKU: 21512-1 | UPC: 024844263056
K&N Universal Adapter 6 Inch Filter 3.5in Coupler
The K&N 21512-1 adapter connects 6-inch diameter air filters to 3.5-inch intake couplers expanding options for custom air intake builds across various vehicles. This versatile component supports unrestricted airflow in performance applications. Constructed for long-lasting use in demanding conditions.
Key Features
- Expanded Compatibility: Fits 6-inch filter flanges to 3.5-inch tubes enabling broader air filter use in custom setups
- Engineered Airflow: Design maintains smooth air path for efficient engine breathing and power gains
- Premium Rubber Build: Flexible high-quality material resists cracking heat and wear over time
- K&N Warranty Coverage: Protected by K&N limited warranty against defects
- Secure Connection: Tight seal prevents boost leaks in turbo or supercharged systems
Product Notes
- Suitable for dry or oiled filter elements in high-performance intakes
- Inspect periodically and replace if damaged for optimal function
- Standard ground shipping with tracking provided
Installation Notes
- Professional installation recommended.
- Slide coupler end over 3.5-inch tube and align flange with filter base
- Use K&N clamps for secure mounting without drilling
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Custom Air Intakes | All |
Why Choose K&N?
- Decades of air intake innovation since 1969
- Materials tested for extreme racing conditions
- Precise manufacturing for consistent results
Frequently Asked Questions
- Q: Does this adapter work with my custom intake?
A: Yes it connects any 6-inch K&N filter to 3.5-inch tubing ideal for universal performance builds - Q: What material is the adapter made from?
A: Black rubber compound for flexibility durability and resistance to oil fuels and temperatures up to 350F - Q: What warranty applies to this part?
A: Covered under K&N limited warranty for manufacturing defects with easy claims process
Shipping &. Handling
- Method: Standard Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective box 7.25 x 6.75 x 1.5 inches
- Weight: 0.31 lbs
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