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The factory airbox on the 2001–2005 Lexus IS300 and Toyota Altezza is designed for silence, not performance. Behind that restrictive intake maze sits the legendary 2JZ-GE 3.0L inline-six — an engine capable of far more than the stock intake lets it breathe.
Flashark's cold air intake kit replaces the entire factory airbox assembly with a mandrel-bent aluminum intake tube and a high-flow dry cone filter. The result is a noticeably sharper throttle pedal, a deeper induction growl that the 2JZ deserves, and a cooler, denser air charge entering the combustion chamber. On a healthy 2JZ-GE, you can expect 5–10 WHP and improved mid-range pull — especially when paired with a free-flowing exhaust.
Installation takes 45–90 minutes with basic hand tools. No cutting, no welding, no permanent modifications. Everything bolts directly onto the factory mounting points. The dry filter requires no oiling and can be cleaned with compressed air for years of service — perfect for a daily-driven IS300 or weekend Altezza build.
Key Features
2JZ-GE–specific design – Engineered for the naturally aspirated 3.0L inline-6 found in 2001–2005 Lexus IS300 (USDM) and Toyota Altezza (JDM); not compatible with turbocharged 2JZ-GTE setups
Mandrel-bent aluminum intake tube – Black powder-coated finish resists heat and corrosion; smooth internal bends maintain airflow velocity from filter to throttle body
High-flow dry cone filter – Oil-free design means no MAF sensor contamination risk; washable with compressed air, no special cleaning kit required
Heat shield included – Shields the filter from direct engine bay heat; helps maintain cooler intake air temps compared to an open-element setup
5–10 WHP on stock 2JZ-GE – Realistic gains on an otherwise stock engine; gains scale when paired with exhaust/header upgrades
Bolt-on, no fabrication – Reuses factory mounting points; all couplers, clamps, and hardware included
Inline-6 induction sound – Unlocks the 2JZ's signature intake growl without being obnoxious at cruise
45–90 minute DIY install – Uses basic hand tools (socket set, screwdrivers); no lift required
Specifications
Brand: Flashark
SKU: FLIS25129
Type: Cold Air Intake Kit (Heat Shield Style)
Pipe Material: Aluminum (mandrel-bent)
Pipe Finish: Black powder-coated
Filter Type: Dry (oil-free, reusable)
Filter Color: Red
Heat Shield: Included
Intake Diameter: 3.0 inch (76mm)
Installation: Bolt-on, no cutting or welding required
Package Includes
1x Black powder-coated aluminum mandrel-bent intake tube
1x High-flow dry cone air filter (red)
1x Heat shield assembly with mounting bracket
1x Set of silicone couplers
3x Set of stainless steel hose clamps
1x Set of mounting hardware (bolts, nuts, washers)
1x Installation guide
| Years | Make | Model | Engine |
|---|---|---|---|
| 2001–2005 | Lexus | IS300 | 3.0L L6 2JZ-GE (NA) |
| 2001–2005 | Toyota | Altezza | 3.0L L6 2JZ-GE (NA) |
Not compatible with: Turbocharged 2JZ-GTE engines, Lexus GS300 (chassis/intake routing differs), IS200 (1G-FE engine).
Q: Will this fit my 2001-2005 Lexus IS300 or Toyota Altezza?
A: Yes. This intake is designed for 2001–2005 Lexus IS300 (USDM) and Toyota Altezza (JDM) equipped with the naturally aspirated 3.0L 2JZ-GE inline-6 engine. Always verify your engine code (2JZ-GE, not 2JZ-GTE) before ordering.
Q: Is this compatible with the turbocharged 2JZ-GTE?
A: No. This intake is designed specifically for the naturally aspirated 2JZ-GE layout. The 2JZ-GTE uses a completely different intake routing due to the turbocharger and intercooler piping. Do not purchase this for a GTE engine.
Q: Will this fit a Lexus GS300 with the same 2JZ-GE engine?
A: Not guaranteed. While the GS300 shares the 2JZ-GE engine, its chassis layout and intake routing differ from those of the IS300/Altezza platform. Clearance around the strut tower, airbox location, and MAF sensor harness length may not match. We recommend verifying fitment on your specific GS300 before ordering.
Q: How much horsepower does this intake add?
A: On a stock 2JZ-GE, expect 5–10 WHP with improved throttle response and mid-range torque. Gains increase when combined with a catback exhaust or headers. The most noticeable improvement is driveability — sharper throttle tip-in, smoother power delivery, and faster revving at mid-to-high RPM.
Q: Do I need a tune after installing this intake?
A: No. This is a bolt-on intake that works within the factory ECU's fuel trim range. A tune is not required for safe operation. However, if you've also installed headers, a larger throttle body, or other airflow mods, an ECU tune can help optimize air-fuel ratios for maximum benefit.
Q: Will this intake trigger a check engine light (CEL)?
A: A properly installed intake should not trigger a CEL on a healthy 2JZ-GE. Most CEL issues are caused by MAF sensor misalignment (not seated flush in the tube), loose hose clamps creating unmetered air leaks, or a damaged MAF sensor during the swap. Double-check all connections if a CEL appears.
Q: Is this intake safe for daily driving?
A: Yes. The heat shield helps protect the filter from engine-bay heat, and the dry-filter design means no risk of oil contamination to the MAF sensor. The one caveat: avoid driving through deep standing water, as the cone filter sits lower than the factory-sealed airbox. For normal rain and puddles, there is no issue.
Q: Will this intake make my IS300 louder?
A: Yes. You'll hear a deeper, more aggressive induction note from the engine bay — especially above 3,500 RPM under heavy throttle. At idle and cruise, the sound is subtle. It's the classic 2JZ intake growl that the factory airbox was designed to silence.
Q: Is this better than the stock IS300 airbox?
A: Yes, in terms of airflow and sound. The factory airbox uses a panel filter with restrictive baffling designed for noise reduction. This intake replaces that entire assembly with a free-flowing pipe and large cone filter, significantly reducing intake restriction. The trade-off is slightly more induction noise, which most 2JZ owners consider an upgrade.
Q: What about heat soak in traffic?
A: The included heat shield mitigates heat soak better than a bare open-element filter. In stop-and-go traffic on a hot day, intake air temps will rise somewhat compared to the factory-sealed airbox, but they return to normal once you're moving. For a daily driver in mixed conditions, the heat shield design strikes a good balance between airflow and temperature control.
Q: How do I clean the filter?
A: This is a dry filter — no oil required. Simply remove the filter, tap out loose debris, and blow compressed air from the inside out. For heavier buildup, rinse with warm water and let air-dry completely before reinstalling. Clean every 15,000–20,000 miles or when visibly dirty.
Q: What's the install difficulty on a scale of 1–10?
A: About a 3–4 out of 10. You'll need basic tools (10mm and 12mm sockets, Phillips and flathead screwdrivers). The job involves removing the factory airbox and intake plumbing, then bolting the new pipe, heat shield, and filter in place. No lift, no cutting, no permanent modifications. Budget 45–90 minutes for a first-timer.
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