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The K&N 57-3048 Performance Air Intake System delivers more airflow to 2003-2004 Chevrolet Trailblazer and GMC Envoy 5.3L V8 engines for gains up to 12.3 horsepower at 5200 RPM and added torque. This kit replaces the factory air filter and intake tube with a roto-molded high-density polyethylene HDPE tube and oversized oiled cotton high-flow filter protected by a custom heat shield. Installation takes 60 minutes or less using basic hand tools and it carries a No-Hassle Lifetime Limited Warranty.
Key Features
- High-Flow Air Filter: Washable reusable oiled cotton media in an oversized conical design lasts up to 100000 miles between cleanings under normal highway driving.
- Power Gains: Dyno-tested increase of 12.3 HP at 5200 RPM and matching torque improvement.
- Roto-Molded HDPE Intake Tube: Increases airflow volume to the engine while resisting heat from the engine bay.
- Custom Heat Shield: Shields intake air from underhood heat for cooler denser air charge.
- Easy Maintenance: Filter cleans with K&N cleaning kit no replacement needed for life of vehicle.
- Easy bolt-on replacement for stock components no cutting or permanent modifications required.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2003-2004 | Chevrolet | Trailblazer EXT | LS, LT, North Face |
| 2003-2004 | GMC | Envoy XL | SLE, SLT |
| 2004 | GMC | Envoy XUV | SLE, SLT |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | 57-3048 |
| 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 57-3048. 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 57-3048 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 57-3048 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 57-3048?
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
- Completes in 60 minutes or less with basic hand tools no special tools needed
- Includes all necessary hardware clamps and instructions compatible with OEM components
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