Advance Headers | Mild Steel Tuned 4-into-1 Extractors | Holden Commodore VE VF Statesman WM 6.0L 6.2L | A319TX

PRODUCT CONTENTS:

• 1 x Heavy-Duty Mild Steel Tuned Length 4-into-1 Left-Hand Header Bank Assembly
• 1 x Heavy-Duty Mild Steel Tuned Length 4-into-1 Right-Hand Header Bank Assembly
• 1 x Plug-and-Play Oxygen (O2) Sensor Wiring Extension Harness Kit

Key Features:

• Advanced tuned-length 4-into-1 configuration groups gas flow routing columns uniformly to drastically increase high-RPM scavenged velocity fields above typical Tri-Y designs
• Heavy-wall, mandrel-bent 1¾" primary pipelines maintain completely perfect internal diameters to clear backpressure bottlenecks entirely
• High-velocity 3" outlet pipe collectors significantly boost exit volume capacity—ideal for aggressive camshaft configurations, forced induction, and dyno-tuned setups
• Heavy-duty mild steel construction structurally built to absorb intense thermal expansion cycles, high-RPM vibration stresses, and harsh track conditions safely
• Thick, precision laser-cut cylinder head flanges maintain a flat, ultra-stable mating footprint to permanently guard against warping, face distortion, and high-pressure gas leaks

Specifications:

⚠️ Crucial Performance Modification & ECU Tuning Warnings:
Due to the optimized tuned 4-into-1 runner design moving the final 3" collectors further downstream, the following fitment requirements must be adhered to:
1. Catalytic Converter Relocation Mandate: This product (Part No. A319TX) is a race-inspired high-performance system. The factory or aftermarket catalytic converters MUST be physically cut and re-positioned downstream to align correctly with the extended exit geometry of the collectors.
2. Engine Edit / ECU Tune Required: Because the relocated catalytic converters change exhaust flow characteristics and sensor distances, an Engine Edit (PCM/ECU re-tune) is mandatory post-installation to prevent Check Engine Lights (CEL), optimize the air-fuel ratio, and unlock the true horsepower potential of the system.
3. Harness Inclusions: The package includes premium oxygen sensor wiring extensions to easily bridge the factory wiring harness down to the new downstream collector locations.

Please Note: Due to the high-velocity 3" collector exit formatting, custom catalytic adjustments, and required engine calibration, professional installation by an exhaust specialist and tuning by a qualified performance workshop is highly recommended.