Toyota Tacoma 1999–2004 3.4L V6 (5VZ-FE) Cold Air Intake
This Flashark cold air intake kit replaces the factory airbox and intake tube on 1999–2004 Toyota Tacoma models powered by the 3.4L V6 (Toyota 5VZ-FE) engine. The kit pairs a mandrel-bent aluminum intake tube with a sealed heat shield and a washable red cone filter, so the engine pulls cooler, denser air from outside the hottest part of the bay instead of the stock enclosed box. For first-generation Tacoma owners who want a bolt-on upgrade with reusable filtration, a deeper intake tone, and a cleaner engine-bay appearance, this kit delivers the core hardware swap without ECU tuning or permanent modification.
Engineered as a direct-fit replacement that retains the factory mass airflow (MAF) sensor location and bore, the kit installs with hand tools in approximately 35 minutes — no cutting, no splicing, no tune required for a stock 5VZ-FE. Polished aluminum pipe, red performance filter, heat shield, silicone couplers, hose clamps, and a mounting bracket are all included, so the original airbox can come out in one piece and the new intake goes in without improvised hardware.
Specifications
| Brand | Flashark |
| Type | Cold Air Intake Kit |
| Style | Heat Shield Cold Air Intake |
| Fitment | 1999–2004 Toyota Tacoma 3.4L V6 (5VZ-FE), 2WD and 4WD |
| Material | Mandrel-bent aluminum intake tube |
| Color | Polished pipe with red cone filter and black heat shield |
| Filter | Washable and reusable high-flow cone filter (oiled cotton media) |
| Sensor Compatibility | Retains factory MAF sensor at OEM location and bore |
| Tune Required | No for stock 5VZ-FE with factory MAF retained |
| Included Hardware | Intake tube, heat shield, cone filter, silicone couplers, hose clamps, mounting bracket, installation guide |
| Install Time | Approximately 35 minutes with hand tools (page-claimed; no cutting required) |
| SKU | FLIS25078 |
Key Features
- Sealed heat-shielded intake: The black heat shield isolates the filter from engine-bay heat and routes cooler air from outside the bay to the filter, so the 3.4L V6 draws denser charge air rather than hot under-hood air.
- Direct-fit replacement for the factory airbox and intake tube: The mandrel-bent aluminum tube is engineered to match the OEM mounting points and MAF sensor location on 1999–2004 Tacoma 3.4L applications, so the stock airbox comes out and the new tube drops in without cutting or splicing.
- Factory MAF sensor retained at OEM location and bore: The mass airflow sensor transfers from the stock airbox to the new tube in its original orientation, keeping the MAF calibration within the OEM design envelope and avoiding a custom calibration on a stock 5VZ-FE.
- Washable and reusable high-flow cone filter: The red oiled-cotton filter is serviceable rather than disposable — clean and re-oil on a regular interval instead of swapping in a new paper element at every service.
- No tune required for a stock 5VZ-FE installation: With the factory MAF sensor retained and the intake sealed to the throttle body, a basic bolt-on install on an otherwise stock 3.4L V6 does not need additional fuel or ECU calibration.
- Bolt-on install in approximately 35 minutes with hand tools: The kit installs with basic hand tools, no permanent vehicle modification, and no specialty shop visit required for a stock application.
- Hardware and install guide included in the box: Silicone couplers, hose clamps, a mounting bracket, and an installation guide ship with the kit so the original airbox can come out and the new intake can go in as one self-contained job.
Who This Kit Is For
This kit is built for 1999–2004 Toyota Tacoma owners running the 3.4L V6 (5VZ-FE) who want a sealed, heat-shielded cold air intake and a bolt-on install.
- ✓ For you if you drive a 1999–2004 Tacoma 3.4L and want a sealed cold-air setup with a washable filter.
- ✓ For you if you prefer a reusable oiled-cotton filter over a disposable paper element.
- ✓ For you if you want a deeper induction tone under acceleration without going to an open-element short-ram.
- ✓ For you if your 5VZ-FE is stock or close to stock and you want a no-tune install that retains the factory MAF sensor.
- ✗ Not for you if you have a 1995–2004 Tacoma 2.4L or 2.7L four-cylinder — those engines use a different intake layout.
- ✗ Not for you if you have a 1999–2002 4Runner or 1993–1998 T100 with the same 5VZ-FE engine — the engine-bay mounting points and intake routing differ even though the engine code matches.
- ✗ Not for you if you plan deep-water crossings without a relocation setup — see the hydrolock warning in Check Before Ordering.
- ✗ Not for you if you are in California or a CARB-adopting state and need a CARB EO-approved kit — this SKU does not carry a CARB EO.
Browse the full Toyota cold air intake kit collection for other Toyota platforms.
Check Before Ordering
- Engine and model year: This kit fits 1999, 2000, 2001, 2002, 2003, and 2004 Toyota Tacoma with the 3.4L V6 (5VZ-FE) only. First-generation Tacomas were also offered with 2.4L and 2.7L four-cylinder engines that use a different intake layout and are not covered by this SKU.
- Drivetrain: The intake routing for 2WD and 4WD Tacoma 3.4L models is compatible. Engine size, model year, factory sensor arrangement, and any previous under-hood modifications remain the more important checks.
- Intake type: This is a sealed, heat-shielded cold air intake. The heat shield isolates the filter from engine-bay heat; if you want the loudest possible induction sound instead, a short-ram (open-element) intake is a different product category.
- Sensor and throttle-body fitment: The factory MAF sensor is retained and re-installed on the new tube in its original orientation. Confirm the MAF sensor bore, the throttle-body coupler size, and the breather hose routing match the product photos before removing the stock airbox. A swapped intake manifold, modified throttle body, or non-factory MAF sensor is a conditional fit and should be verified before installation.
- Legality in your state: This kit does not carry a CARB Executive Order (EO). It is not legal for sale or use in California and other CARB-adopting states. Diesel applications and pre-1995 vehicles are generally exempt from CARB EO requirements, but this SKU is a gasoline 5VZ-FE application.
- Filter care and installation environment: The oiled-cotton filter needs periodic cleaning and re-oiling — over-oiling can migrate to the MAF sensor and cause hesitation or a CEL. Inspect the filter more often in dust, sand, or off-road conditions. The filter sits in the engine bay; avoid deep-water crossings (hydrolock risk) and consider a high-mounted or relocation intake if you regularly ford water.
What's in the Box
- Polished aluminum intake tube ×1
- Red washable and reusable high-flow cone filter ×1
- Sealed heat shield ×1
- Silicone coupler(s) and hose clamp(s)
- Mounting bracket and hardware pack
- Installation guide
Replacement and service parts — including a spare washable filter and cleaning kit for the Toyota Tacoma 3.4L intake — are available in the Toyota air intake collection.
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.
Fitment:
2004 Tacoma V6 3.4L
2003 Tacoma V6 3.4L
2002 Tacoma V6 3.4L
2001 Tacoma V6 3.4L
2000 Tacoma V6 3.4L
1999 Tacoma V6 3.4L
1999–2004 Toyota Tacoma 3.4L V6 (5VZ-FE) Cold Air Intake FAQs
Q1: Is this cold air intake legal in my state?
A1: Not legal for sale or use in California (and other CARB-adopting states). This SKU does not carry a CARB Executive Order. If you are outside a CARB-adopting state, verify your local and county emissions rules before installing the kit on a registered street vehicle. This kit is intended for off-road, racing, or non-street use in jurisdictions where emissions rules apply. For the broader CARB-adopting state list and emissions-legal intake alternatives, see the Air Intake System hub for CARB and off-road applications.
Q2: Will this fit my Tacoma?
A2: This kit fits 1999, 2000, 2001, 2002, 2003, and 2004 Toyota Tacoma models with the 3.4L V6 (5VZ-FE) engine, in both 2WD and 4WD configurations. The kit is not intended for a Tacoma with a 2.4L or 2.7L four-cylinder engine. If your truck has a swapped intake manifold, a modified throttle body, or a non-factory MAF sensor, contact us with your VIN and current setup before ordering.
Q3: How much horsepower will this add?
A3: Typical intake-only gains for a stock 3.4L V6 Tacoma are approximately +3–10 hp and +3–10 lb-ft of torque, with results varying based on the engine condition, intake-air temperature, exhaust flow, ECU correction, and supporting hardware. The factory Tacoma intake already pulls air from outside the hottest part of the bay, so this kit should not be expected to create a large, fixed power increase on its own. Page-claimed figures of approximately +9% torque and approximately 3% MPG gains were generated on a single internal baseline; treat them as a representative reference rather than a fixed outcome for every truck.
Q4: Will a cold air intake improve my MPG?
A4: MPG is dominated by driving habits. An intake alone can't promise a measurable gain. Expect the main benefit as throttle response and intake tone rather than fuel economy. Tire size, lift height, gearing, vehicle weight, four-wheel-drive use, engine maintenance, and post-install driving style typically have a larger effect on mileage than the intake itself.
Q5: Will this void my warranty?
A5: Under the Magnuson-Moss Warranty Act, an aftermarket part cannot void your factory warranty unless the manufacturer proves it caused the failure. This kit is designed as a direct bolt-on replacement that keeps the factory MAF sensor at the OEM location, so a stock 5VZ-FE installation should not affect the powertrain warranty on its own. Powertrain, emissions, and aftermarket-modification coverage still vary by dealership and region; consult your dealer for the specific terms that apply to your truck.
Q6: Will it throw a check engine light (CEL)?
A6: This kit is designed to retain the factory MAF sensor location and bore, which keeps the MAF calibration within the OEM design envelope. A P0171 lean code or a CEL on a 3.4L Tacoma is most often the result of an intake leak after the MAF sensor, a loose coupler, a disconnected vacuum hose, a dirty MAF element, an incorrectly positioned sensor, or a pre-existing fuel-delivery issue. Inspect the install and read the stored diagnostic code before replacing parts.
Q7: Do I need a tune after installing?
A7: No tune is required for a basic bolt-on install on an otherwise stock 5VZ-FE when the factory MAF sensor is transferred correctly and the intake has no air leaks. Additional fuel or ECU calibration may become relevant on trucks with a supercharger, larger injectors, modified airflow sensors, or other substantial performance upgrades.
Q8: Is this intake safe in rain or deep water?
A8: Normal rain driving is fine — the heat-shielded filter sits inside the engine bay and pulls air from outside the hottest part of the bay. Avoid deep-water crossings; water ingestion can cause hydrolock and severe engine damage. If you regularly ford water on a Tacoma 4WD, consider a high-mounted or relocation intake setup before driving through standing water above the bumper line.
Q9: How do I clean and re-oil the filter?
A9: The red oiled-cotton filter is washable and reusable. Apply a quality filter cleaner, let it soak, rinse with water from the clean side out, let the filter air-dry fully, then apply a light, even coat of filter oil on the media. Over-oiling can coat the MAF sensor and cause hesitation or a CEL — keep oil on the filter media only and avoid pooling at the MAF end.
Q10: What does it sound like?
A10: You'll hear a deeper intake tone under acceleration; at steady cruise the sealed heat-shielded intake stays noticeably quieter than an open-element short-ram. The factory airbox dampens induction noise, so removing it makes the 3.4L V6 more audible under load. Sound is subjective — if you want the loudest possible option, an open-element short-ram intake is a different product category.
Q11: What's included and what do I still need?
A11: The kit includes the polished aluminum intake tube, the red washable cone filter, the sealed heat shield, silicone couplers, hose clamps, the mounting bracket, the hardware pack, and the installation guide. The factory MAF sensor is retained from your stock airbox and reinstalled on the new tube — the sensor itself is not included in this kit because it transfers from the original equipment. A basic socket and screwdriver set is sufficient for the install.
Q12: Will this fit a 4Runner or T100 with the 3.4L engine?
A12: No. This kit is confirmed for 1999–2004 Toyota Tacoma 3.4L V6 applications only. Although some 1999–2002 4Runner and 1993–1998 T100 models also use the 5VZ-FE engine, their engine-bay mounting points, intake routing, and bracket positions differ, so fitment should not be assumed based on the engine code alone. See the dedicated 4Runner and T100 intake kits in the Toyota air intake kit collection for fitment on those platforms.