Weapon-R Air Intake Kit
Weapon-R 301-116-101 Secret Weapon Cold Air Intake Kit Polished Aluminum - 6061
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Weapon-R 302-130-101 Secret Weapon Short Ram Air Intake Polished Aluminum - Kit
Weapon-R 302-131-109 Secret Weapon Stealth Series Cold Air Intake
Weapon-R 301-173-101 Secret Weapon Short Ram Air Intake Kit - Polished
Weapon-R 301-169-301 Secret Weapon Cold Air Intake Kit - 3-Piece Polished
Weapon-R 301-167-101 Secret Weapon Short Ram Air Intake Kit - Polished
Weapon-R 301-124-101 Secret Weapon Short Ram Intake Kit - Polished 6061 Aluminum
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Weapon-R 301-123-401 Secret Weapon Short Ram Air Intake Kit - Polished
Weapon-R 301-123-101 Secret Weapon Short Ram Air Intake Kit - Polished
Weapon-R 301-121-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
Weapon-R 301-129-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
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Weapon-R 301-125-109 Secret Weapon Air Intake Kit Polished Aluminum Stealth Series
Weapon-R 302-116-101 Secret Weapon Short Ram Air Intake Polished Aluminum - 6061
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Weapon-R 302-114-101 Secret Weapon Air Intake System Polished Aluminum
Weapon-R 301-154-101 Secret Weapon Short Ram Air Intake Kit - Polished
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Weapon-R 301-141-101 Secret Weapon Air Intake Kit Polished Aluminum
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Weapon-R 305-111-109 Secret Weapon Stealth Series Short Ram Air Intake - Kit
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Weapon-R 304-141-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
Weapon-R 304-139-101 Secret Weapon Cold Air Intake Kit Polished Aluminum
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Weapon-R 304-136-401 Secret Weapon Neo-Ti Air Intake System
Weapon-R 304-134-401 Secret Weapon Neo-Ti Short Ram Air Intake System
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Weapon-R 304-133-401 Secret Weapon Neo-Ti Air Intake System
Weapon-R 303-127-101 Secret Weapon Air Intake Kit Polished Aluminum
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Weapon-R 303-117-101 Secret Weapon Air Intake Kit Polished Aluminum
Weapon-R 303-115-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
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Weapon-R 303-113-401 Secret Weapon Short Ram Air Intake Polished Aluminum - Kit
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Representative Photo, actual item may vary
Weapon-R 304-127-109 Secret Weapon Stealth Series Short Ram Air Intake System
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Weapon-R 304-126-401B Secret Weapon Cold Air Intake System
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Weapon-R 304-126-109 Secret Weapon Air Intake Kit Stealth Series
Weapon-R 304-125-101B Secret Weapon Air Intake Kit Polished Aluminum - 6061
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Weapon-R 303-120-101 Secret Weapon Air Intake Kit Polished Aluminum
Weapon-R 305-164-109 Secret Weapon Short Ram Air Intake Stealth Black - Kit
Weapon-R 305-161-401 Secret Weapon Air Intake System Neo Titanium Polished
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Weapon-R 307-121-401 Secret Weapon Short Ram Intake - Polished Neo-Ti
Weapon-R 307-115-101 Secret Weapon Short Ram Air Intake Kit - Polished
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Weapon-R 306-122-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
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Weapon-R 306-119-101 Secret Weapon Air Intake System - Polished
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Weapon-R 305-153-101 Secret Weapon Air Intake System Polished Aluminum - 6061
Weapon-R 305-148-101 Secret Weapon Short Ram Air Intake System - Polished
Weapon-R 305-139-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
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Weapon-R 307-112-101 Secret Weapon Cold Air Intake System
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Weapon-R 305-145-101 Secret Weapon Air Intake System Polished Aluminum
Weapon-R 307-192-101 Secret Weapon Short Ram Intake Kit Polished
Weapon-R 307-190-101 Secret Weapon Short Ram Air Intake Kit - Polished
Weapon-R 307-189-301 Secret Weapon 2-Piece Polished Cold Air Intake Kit
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Weapon-R 307-199-101 Secret Weapon Cold Air Intake Kit - Polished
Weapon-R 307-198-101 Secret Weapon Cold Air Intake Kit Polished Aluminum
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Weapon-R 307-197-101 Secret Weapon Air Intake Kit Polished Aluminum
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Weapon-R 308-117-401 Secret Weapon Polished Aluminum Cold Air Intake System
Weapon-R 307-185-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
Weapon-R 307-184-109 Secret Weapon Intake Stealth Series Polished Aluminum Cold Air Intake
Weapon-R 307-184-101 Secret Weapon Air Intake Kit Polished Aluminum - 6061
Weapon-R Air Intake Kits: Physics-Driven Performance Induction
Weapon-R has been engineering performance induction systems since 1993, and their air intake kits stand as the cornerstone of the brand's identity. Rather than simply relocating a cone filter, Weapon-R built their intake lineup around a distinct engineering philosophy — one rooted in fluid dynamics — to wring more air volume and velocity out of every intake charge.
The Secret Weapon: Dual-Velocity Airflow Technology
At the heart of Weapon-R's most celebrated intake line is the Secret Weapon Intake System. The design leverages two well-established principles of physics: the Coanda effect and Bernoulli's principle. By intentionally shaping the intake pipe to harness these forces, the system creates two distinct air velocity profiles inside the tube simultaneously — one stream moving faster than the other. This dual-velocity approach increases both air mass and volume delivered to the engine, with Weapon-R claiming the system can feed an engine up to three times more air than a conventional intake design.
On the filter side, the SW1 air filter features a tuned velocity stack specifically engineered to reduce turbulence at the inlet and increase air velocity before it even enters the pipe. The filter media itself is a high-density, open-pore reusable foam that is designed for long service life — and it backs that up with a 1 Million Mile Limited Warranty, a statement of confidence rarely seen in the performance intake segment.
Construction and Fitment
Every Secret Weapon intake pipe is formed from premium 6061 aluminum using an automated CNC mandrel bending process, which produces smooth, radius-optimized bends that minimize turbulence and maintain structural integrity. Finished systems are available in a high-polish show-quality look or a durable powder-coated stealth black, giving builders the choice of an eye-catching engine bay centerpiece or a sleek, understated install.
Beyond the flagship Secret Weapon line, Weapon-R offers the Dragon Intake series as well as Ram Air Kits and CARB-approved intake options for emissions-compliance-conscious enthusiasts. The brand's coverage spans domestic muscle, Japanese sport-compact, European, and Korean platforms — including dedicated fitments for Honda/Acura, Toyota/Lexus/Scion, Nissan/Infiniti, Subaru, Mitsubishi, Mazda, Hyundai/Kia, and domestic V8 applications.
Why Weapon-R Stands Out in the Air Intake Category
- Physics-based dual-velocity design — not just a relocation of the stock filter box
- CNC mandrel-bent 6061 aluminum tubing for optimized, smooth airflow paths
- Tuned velocity stack SW1 filter that reduces turbulence while increasing air speed
- Reusable, high-density open-pore foam media backed by a 1 Million Mile Limited Warranty
- Polished or stealth black finish options to suit any build aesthetic
- Broad platform coverage across sport-compact, JDM, European, and domestic applications
For enthusiasts who want more than a bolt-on cone filter — and who appreciate an intake design grounded in engineering principles — Weapon-R's air intake kit lineup offers a compelling, proven option. Browse the full selection of Weapon-R Air Intake Kits to find the right fit for your vehicle.
