Stainless Steel Exhaust Headers for Nissan 350Z (2003-2006) 3.5L

High-Flow Stainless Steel Exhaust Headers for 2003-2006 Nissan 350Z (Z33)

What it Does: The Stainless Steel Exhaust Headers replace the restrictive factory cast iron exhaust manifolds on the 2003-2006 Nissan 350Z to reduce exhaust backpressure and optimize cylinder scavenging for improved power delivery.

The Stock Nissan 350Z Exhaust Manifold Bottleneck

The OEM cast iron exhaust manifolds on the Z33 platform feature restrictive, uneven runner lengths and rough interior casting walls that generate severe turbulence. This restriction impedes exhaust gas velocity, increases cylinder head backpressure, and retains excessive thermal energy near the engine block. Under high-RPM track or performance driving, this restriction limits mid-to-high-range airflow dynamics and stifles the natural breathing potential of the naturally aspirated V6 platform.

The Engineering Solution

Engineered from mandrel-bent T-304 stainless steel tubing, these shorty headers feature a tuned 2 x 3-into-1 runner configuration with 1.75 x 1.25-inch oval primary inlets transitioning into 2.25-inch collectors. The smooth internal bore accelerates exhaust scavenging pulses to pull burned gases cleanly from each combustion chamber. Precision CNC-machined, thick flanges eliminate surface warping under sustained heat cycles to prevent high-temperature blowouts, while integrated O2 sensor bungs allow a direct bolt-on transition to the OEM catalytic converters without cutting or welding.

What's Included

• 2 Exhaust Headers (Left and Right)
• 2 Header Gaskets
• 2 Collector Gaskets
• Installation Hardware

Technical Specifications

Compatibility

• 2003-2006 Nissan 350Z 3.5L VQ35DE V6 (Rear-Wheel Drive)

Frequently Asked Questions & Fitment Warnings

Does this fit the Z33 350Z?

Yes, this is a direct fit for the 2003-2006 Nissan 350Z equipped with the VQ35DE engine. Does not fit Infiniti FX35 or later 350Z models equipped with the dual-intake VQ35HR engine.

Are these headers legal for street use in emissions-controlled states?

These aftermarket headers are intended for off-road and racing use only as they are not CARB-certified and lack an Executive Order (EO) number for street use in California and states following CARB regulations.

The Nissan Performance Caliber

Engineered for high-revving JDM performance, these headers liberate the iconic tone of the VQ35DE while sharpening throttle response and optimizing top-end pull across the rev range.