Weapon R 97-2001 Infinity Q45 4.1L Secret Weapon Intake

SKU: 304-146-101

Weapon R Secret Weapon Intake System for 1997-2001 Infiniti Q45 4.1L

The Weapon R Secret Weapon Intake System is engineered to deliver more air to your engine than any standard intake option. This system stands out by using patented dual-velocity airflow technology, pulling in three times the air volume of typical setups for noticeable gains in horsepower, torque, and throttle response. Dyno tests from Tuner Performance Reports Magazine confirm it beats both cold air and short ram intakes in real-world acceleration and power delivery, making it the clear pick for Q45 owners seeking reliable performance gains without complexity.

Precise Vehicle Fitment

This intake bolts on directly to:

• 1997-2001 Infiniti Q45 Base (4.1L V8 – VH41DE engine)
• 1997-2001 Infiniti Q45 T (4.1L V8 – VH41DE engine)
• 2000 Infiniti Q45 Anniversary Edition (4.1L V8 – VH41DE engine)

Installation takes under an hour with basic tools no cutting, drilling, or modifications required. It’s a direct replacement for the factory airbox, ensuring a seamless fit on all trim levels.

Complete Kit Contents

Every purchase of the Weapon R 304-146-101 includes:

• Mandrel-Bent Intake Tube: Precision-crafted from 6061-T6 aluminum for strength and lightweight design, polished to a mirror finish for corrosion resistance and style under the hood.
• SW1 High-Flow Air Filter: 1-inch thick, open-pore polyurethane foam element with an integrated tuned velocity stack to cut turbulence and boost air speed. Fully reusable clean and reinstall in minutes with mild soap and water.
• Silicone Couplers and Stainless Steel Clamps: Heat-resistant connections for secure, vibration-proof mounting.
• All Mounting Hardware: Bolts, brackets, and adapters for plug-and-play setup.

This full bolt-on kit replaces the restrictive OEM intake, unlocking your Q45’s potential while maintaining emissions compliance where applicable.

Proven Performance Advantages

Backed by U.S. Patent #7,263,961 B2, the Secret Weapon design applies the Coanda effect and Bernoulli’s principle to split airflow into high- and low-speed streams. This feeds denser, cooler air to your 4.1L V8, resulting in:

• Up to 10-15 horsepower and 12-18 lb-ft of torque increases (based on independent dyno results for similar applications).
• Smoother power band across the RPM range for quicker acceleration from a stop.
• Deeper engine growl on hard pulls, enhancing the driving experience.

Drivers report crisper response and better fuel efficiency on highway cruises, setting this intake apart from basic filters or generic tubes that fall short on flow.

Durability and Backing

Built to last with a limited 1-million-mile warranty, this system uses premium materials tested for extreme conditions. The aluminum tube resists heat soak, while the foam filter traps dirt without choking airflow far beyond paper elements that clog quickly.