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The 2JZ-GE is one of the most celebrated inline-six engines ever built — but Lexus choked it with a restrictive factory airbox designed for silence, not airflow. That sealed plastic box, multiple resonator chambers, and paper panel filter force the engine to work harder just to inhale. The result: lazy throttle response and a muted exhaust note that buries the very character that makes the IS300 special.
This Flashark cold air intake replaces the entire factory system with a single-piece 70mm mandrel-bent aluminum intake tube and a high-flow dry cone filter. The wider, smoother airflow path reduces intake restriction and delivers denser, cooler air directly to the throttle body. On a stock 2JZ-GE, expect 5-10 wheel horsepower gain — but the real difference is the sharpened throttle response and mid-range torque feel that transforms how the car pulls from 3,000 RPM onward.
Everything mounts to factory bolt locations with the included bracket and hardware. No cutting, no drilling, no check engine lights. With basic hand tools in about 60 minutes, you unlock the induction sound this inline-six was always meant to make.
Key Features
70mm Mandrel-Bent Aluminum Intake Tube — Single-piece construction with integrated mounting flange. Finished in heat-resistant matte black powder coat. Delivers a smooth, unrestricted airflow path from filter to throttle body while resisting underhood heat soak.
High-Flow Dry Cone Filter — Red cotton-gauze element, 120mm top / 155mm base / 130mm height, 70mm inlet. Dry-type media requires no oiling — clean, rinse, dry, and reinstall. Washable and reusable for the life of the vehicle.
Direct-Fit Silicone Coupler — 70mm × 65mm straight coupler bridges the intake tube to the throttle body with a precise, airtight seal. Heat-resistant silicone won't crack or deform at engine-bay temperatures.
Dual Breather Hoses — Two PCV/vacuum hoses (D13-d7 × 380mm and D13-d7 × 500mm) connect directly to the factory PCV valve and vacuum ports. Maintains closed-loop crankcase ventilation — no CEL triggers.
Complete Installation Hardware — Filter clamp ×1, narrow clamps ×2, mini clamp ×1, M6 anti-vibration mount bracket with washer and lock nut, M6×8 socket-head cap screws ×2, hex key ×1. Everything shown is everything included.
True Bolt-On Design — Integrated mounting bracket aligns with factory bolt holes. No cutting, drilling, or permanent modification required. The stock airbox can be reinstalled at any time.
Aggressive 2JZ Induction Sound — The open-element cone filter and aluminum tubing produce a deep, resonant intake growl under acceleration — exactly what the 2JZ-GE was built to deliver above 4,000 RPM.
5-10 WHP Gain on Stock Tune — Dyno-verified improvement on an otherwise stock 2JZ-GE. Combined with sharper throttle tip-in and stronger mid-range pull. No ECU tune required.
Specifications
SKU: FLIS25041
Intake Tube Material: Aluminum
Intake Tube Finish: Matte black powder-coated
Intake Tube Diameter: 70mm (2.76")
Filter Type: Dry (no oil required)
Filter Media: Red cotton-gauze, washable & reusable
Coupler: Straight silicone
Total Weight: 3.0 kg (6.6 lbs)
Estimated Install Time: 45–90 minutes
Tune Required: No (factory ECU adapts)
Package Includes
1 × Aluminum intake tube
1 × High-flow air filter
2× Straight silicone coupler
3x stainless steel hose clamps
1x Mounting bracket and hardware kit
| Years | Make | Model | Engine |
|---|---|---|---|
| 2001–2005 | Lexus | IS300 Base Sedan | 3.0L L6 DOHC (2JZ-GE) |
| 2001–2005 | Lexus | IS300 Sportcross Wagon | 3.0L L6 DOHC (2JZ-GE) |
Q: Will this fit my 2003 Lexus IS300 Sportcross?
A: Yes. All 2001–2005 IS300 Base Sedan and Sportcross Wagon models with the 3.0L DOHC 2JZ-GE engine are direct bolt-on compatible. The Sportcross engine bay layout is identical to the sedan for intake fitment purposes.
Q: Does this fit manual transmission IS300s?
A: The intake is designed around the automatic transmission model's bracket layout. Manual (W55) IS300s have slightly different mounting points near the intake bracket. Some manual owners report successful installation with minor bracket adjustment; others use a small custom spacer. If you're on a manual car, expect to spend an extra 10–15 minutes on bracket fitment.
Q: How much horsepower will I gain?
A: On a stock 2JZ-GE, expect 5–10 wheel horsepower gain. The most noticeable improvement is not peak numbers — it's the sharper throttle response and stronger mid-range pull between 3,000–5,500 RPM where the factory airbox bottlenecks the engine most. Combined with a cat-back exhaust, gains are more pronounced.
Q: Do I need a tune after installing this intake?
A: No. The factory ECU's MAF-based fuel trim system automatically adapts to the increased airflow within its correction range. A tune is not required for safe operation, though one can extract additional gains if you've also done exhaust modifications.
Q: Will this trigger a check engine light?
A: No, when installed correctly. The two included breather hoses must be connected to the factory PCV valve and vacuum ports, all clamps must be tight, and the MAF sensor must be properly transferred and seated. Any air leak post-MAF can cause a lean code (P0171), so double-check coupler connections.
Q: Is the filter dry or oiled?
A: Dry filter — no oil required, ever. The red cotton-gauze media filters without oil saturation, which means no risk of MAF sensor contamination from filter oil. To clean: tap off loose debris, wash with filter cleaner, rinse thoroughly, air dry completely, and reinstall.
Q: Is this intake better than the stock airbox?
A: Significantly. The stock IS300 airbox routes intake air through multiple resonator chambers and a restrictive paper panel filter — all designed to silence the engine, not feed it. This 70mm open-element system eliminates those restrictions, reduces pumping losses, and produces a far more aggressive induction note. The trade-off is slightly more intake noise at part throttle, which most IS300 owners consider an upgrade.
Q: Will this improve throttle response?
A: Yes — this is the single most noticeable improvement. By reducing intake restriction, the engine reaches its target air mass faster when you open the throttle. The result is quicker tip-in response and less "lag" between pedal input and acceleration, especially noticeable in the 3,000–5,500 RPM range.
Q: Will I get better fuel economy?
A: Not guaranteed. Reduced pumping losses can improve cruising efficiency under steady-state driving, but the improved throttle response and induction sound tend to encourage more aggressive driving — which offsets any efficiency gain. Real-world MPG change is typically negligible.
Q: Will the intake make the car louder?
A: Yes — and that's the point. The cone filter and aluminum tube produce a deep, resonant intake growl under acceleration, especially above 4,000 RPM where the 2JZ-GE really comes alive. At idle and light cruise it's barely noticeable. At wide-open throttle, the sound is aggressive but not obnoxious — it complements the 2JZ's natural inline-six harmonics.
Q: How hard is the install for a beginner?
A: Moderate difficulty. You'll need basic hand tools (socket set, screwdrivers) and roughly 45–90 minutes. The process: remove the factory airbox and resonator assembly, transfer the MAF sensor to the new intake tube, mount the bracket to the factory bolt location, connect the silicone coupler to the throttle body, attach both breather hoses, clamp the filter, and double-check all connections. The included hardware is everything you need. No fabrication required.
Q: Will heat soak be an issue?
A: In stop-and-go traffic or high ambient temperatures, an open-element filter will pull in warmer underhood air compared to the sealed factory airbox. This is inherent to open-element intakes. At speed, airflow through the engine bay normalizes intake temperatures quickly. The matte black powder-coated aluminum tube provides some thermal resistance compared to polished tubes.
Q: Can I use my factory MAF sensor with this intake?
A: Yes. The intake tube has a factory-spec MAF mounting flange. Transfer the MAF sensor from the stock airbox lid, ensure the O-ring seal is intact, and tighten the mounting screws evenly. A poorly seated MAF or air leak around the flange will cause idle issues or fuel trim faults — take your time on this step.
Q: Is a cold air intake worth it for the Lexus IS300?
A: For most IS300 owners, yes — it's one of the most popular first modifications for good reason. For a relatively low cost, you get a sharper throttle response, a more engaging induction sound, and the foundation for further breathing mods (exhaust, headers). The 2JZ-GE responds well to intake upgrades, and this is the easiest way to uncork it without touching the engine internals.
Q: What is the return and warranty policy?
A: Flashark Racing offers a 14-day return window for unused products in original packaging. If the product arrives damaged or defective, we cover return shipping and process a full refund or replacement within 3–5 business days. For any fitment or installation questions before purchase, contact service@flasharkracing.com.
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