Weapon R 03-06 Nissan 350Z Cold Air Extension Pipe (Extension Pipe Only)

SKU: 304-131-201

Weapon-R Secret Weapon Cold Air Extension Pipe – 2003-2006 Nissan 350Z / Infiniti G35

The Weapon-R Secret Weapon Cold Air Extension Pipe (extension pipe only) is the #1 selling add-on for Secret Weapon Intake systems on 2003-2006 Nissan 350Z and Infiniti G35 (VQ35DE). High-quality 6061 aluminum mandrel-bent polished pipe extends intake length for increased air volume, higher velocity, and reduced turbulence the ultimate extension upgrade for any 350Z/G35 build seeking maximum airflow, better mid-range torque, and show-quality engine bay finish when paired with the Secret Weapon filter and velocity stack.

Key Features

• Secret Weapon Technology – Creates dual air velocity profiles for 3x more air volume and speed to the engine
• 6061 Aluminum Construction – High-quality material bent on automated CNC mandrel bender for smooth flow
• Polished Finish – Mirror-like show quality shine enhances engine bay aesthetics
• Extension Pipe Only – Designed to work with Secret Weapon filter, velocity stack, and heat shield
• 1 Million Mile Limited Warranty – Confidence in durability and performance

Spec	Detail
Part Number	304-131-201
Brand	Weapon-R
Type	Secret Weapon Cold Air Extension Pipe
Material	6061 Aluminum
Finish	Polished
Compatibility	2003-2006 Nissan 350Z / Infiniti G35 (VQ35DE) – extension pipe only
Country of Origin	United States
Warranty	1 Million Mile Limited Warranty

Whats Included

• 1 x Weapon-R Secret Weapon Cold Air Extension Pipe (polished aluminum)
• Mounting hardware and clamps (if required)
• Installation instructions

Product Notes

• Extension pipe only – requires Secret Weapon filter, velocity stack, and heat shield for complete intake system
• Increases air intake volume and velocity for improved mid-range torque and high-RPM power
• Polished finish only – complements engine bay aesthetics on 350Z/G35

Installation Notes

• Bolt-on extension to existing Secret Weapon intake components
• Estimated time: 30–60 minutes
• Professional installation recommended for proper alignment and leak-free fitment

This Part Fits

Year Range	Make	Model	Trim / Engine	Notes
2003-2006	Nissan	350Z	All trims	3.5L VQ35DE – extension pipe only
2003-2006	Infiniti	G35	Base / X / Sport	3.5L VQ35DE – extension pipe only

Why Choose Weapon-R Secret Weapon Extension Pipes?

• #1 choice for patented high-velocity intake extensions on VQ35DE engines
• Built & tested in the United States
• Chosen by 350Z/G35 owners for noticeable power gains, cooler IATs, and polished show quality

Frequently Asked Questions

• Q: Does this fit my 2005 Nissan 350Z?
  A: Yes, direct fit extension pipe for 2003-2006 Nissan 350Z and Infiniti G35 3.5L (VQ35DE).
• Q: Is this the complete intake?
  A: No, extension pipe only; requires Secret Weapon filter, velocity stack, and heat shield for full system.
• Q: Will it increase power?
  A: Yes, increases air volume and velocity for improved mid-range torque and high-RPM performance.

Shipping & Handling

• Method: Ground UPS or FedEx
• Availability: In stock – ships same or next business day
• Packaging: Official Weapon-R retail box