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The K&N 57-3512 Performance Air Intake System replaces the factory air filter and intake tube on 1999-2000 Honda Civic Si models. A high-density polyethylene roto-molded tube boosts airflow volume to the engine for dyno-tested gains of 8.59 HP at 5903 RPM and added torque. Paired with a washable high-flow oiled cotton filter this system improves throttle response and power delivery.
Key Features
- Roto-molded HDPE intake tube: Enlarged design sends more air to the engine while resisting heat deformation.
- Custom heat shield: Blocks hot engine bay air for cooler denser intake charge and consistent performance.
- Oversized conical high-flow air filter: Oiled cotton media cleans every 100000 miles under highway driving lasts up to 100000 miles between services.
- Replaces OE air filter and intake tube direct bolt-on fit.
- Product weight 6.4 lb (2.9 kg) ships in box 23.5 in x 13.25 in x 10.75 in.
- Includes 4 stainless steel clamps 2 couplers hardware and heat shield.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 1999-2000 | Honda | Civic | CX, DX, EX, GX, HX, LX, Si, Value Package |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | 57-3512 |
| Product Type | Cold Air Intakes |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new K&N cold air intakes identified by manufacturer part number 57-3512. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
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Frequently Asked Questions
How do I confirm K&N 57-3512 fits my vehicle?
Match the year, make, and model in the fitment table, then confirm the engine, factory housing, sensor layout, emissions notes, and any application restrictions stated for this exact part.
Does K&N 57-3512 require tuning or emissions verification?
Requirements vary by vehicle and intake configuration. Check the current K&N application and emissions notes, and complete any required calibration before full-load operation.
What should be checked after installing K&N 57-3512?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
- Typical install takes 60 minutes or less with simple hand tools
- Includes 4 stainless steel clamps 2 couplers hardware and heat shield
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