Stainless Steel Exhaust Headers for Infiniti G35 (2003-2006) 3.5L

High-Flow Stainless Steel Exhaust Headers for 2003-2006 Infiniti G35 (V35)

What it Does: The Stainless Steel Exhaust Headers replace the restrictive factory cast iron manifolds on the 2003-2006 Infiniti G35 to reduce exhaust backpressure and optimize cylinder scavenging for improved power delivery.

The Stock Infiniti G35 Manifold Restriction

Factory exhaust manifolds on the V35 chassis utilize rough cast-iron construction with compromised, unequal-length runners. These OEM manifolds suffer from abrupt directional transitions and internal casting flash that impede high-velocity exhaust pulses from the VQ35DE cylinder head. The uneven runner geometry causes reversion pulses that contaminate adjacent combustion chambers, trapping residual heat soak inside the exhaust ports, increasing pumping losses, and choking high-RPM volumetric efficiency.

The Engineering Solution

These shorty performance headers feature a dedicated 2 x 3-1 runner configuration manufactured from mandrel-bent T-304 stainless steel tubing. Sized with 1.75 x 1.25-inch oval primary inlets and smooth 2.25-inch collectors, each bank merges exhaust pulses smoothly into the factory catalytic converter flanges. CNC-machined, thick sealing flanges prevent thermal warpage across heat cycles, while integrated TIG-welded O2 sensor bungs retain stock sensor placement. The lowered backpressure optimizes exhaust gas velocity and scavenges spent gases rapidly, sharpening throttle response across the powerband.

What's Included

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

Technical Specifications

Compatibility

• 2003-2006 Infiniti G35 3.5L VQ35DE V6 (Rear-Wheel Drive)

Frequently Asked Questions & Fitment Warnings

Does this fit the V35 G35?

Yes, this is a direct fit for the 2003-2006 Infiniti G35 equipped with the VQ35DE engine. Does not fit the Infiniti FX35, all-wheel-drive models, or later VQ35HR dual-throttle-body models.

Should header bolts be retorqued after installation?

Yes, retorque all header bolts and collector hardware after the first 2 to 3 thermal heat cycles to ensure proper gasket compression and prevent exhaust leaks.

The Infiniti Performance Caliber

Tailored specifically for the high-revving characteristics of the JDM-engineered VQ platform, these headers unlock aggressive exhaust acoustics, sharper mid-range torque, and improved top-end breathability.